Did a lot of reading about xbows and ordered a Barnett Predator.
Have been a bench shooter for a while and understand drop in bullet shooting.
Have read here that it's good to practice long and hunt short. That makes sense, but how do you know - except with target shooting, how much to gauge arrow/bolt drop? Is there any rule of thumb?
2
9 replies to this topic
#2
georgiaboy
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- Members
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Member
Posted 22 January 2012 - 04:50 PM
The best advice i can give is to shoot, shoot , then shoot some more!!
Your arrow drop is going to depend on a few variables...bow speed, arrow weight & broadhead and fletching may have some impact. I won't shoot a critter past 40yds so what i do is once i have my bow sighted in at 20yds i back off to 40yds & use my 20yd dot, that will let me know how much arrow drop i have between the two distances.
Good luck!!
Your arrow drop is going to depend on a few variables...bow speed, arrow weight & broadhead and fletching may have some impact. I won't shoot a critter past 40yds so what i do is once i have my bow sighted in at 20yds i back off to 40yds & use my 20yd dot, that will let me know how much arrow drop i have between the two distances.
Good luck!!
Excalibur vortex
Excalibur vixen
Excalibur axiom
Viper-x string
Spitfires & Slicktrick's
Excalibur vixen
Excalibur axiom
Viper-x string
Spitfires & Slicktrick's
#3
Highlander
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- Members
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I Didn't Do It
- LocationHighland, Maryland
Posted 22 January 2012 - 10:16 PM
"Crossbow Arrow & Bolts, Trajectories.
What is trajectory.
In arrow flight, trajectory refers to the exact arcing path the arrow travels from the crossbow to the target downrange, as soon as the arrow leaves the power of the bowstring it is subjected to
atmosheric drag (slowing it down) and
gravity (pulling the arrow down to earth). As the arrow travels downrange it is constantly slowing down and dropping toward the ground, the further it travels, the faster it falls to the ground.
It's all about the velocity.
One of the first things to understanding crossbow arrow trajectories is what are the guiding principals that highten or flatten trajectories. To sum this up, it falls to one word velocity. When you look at the normal distance that deer are harvested with archery equipment, this would be from 10 yards to 30 yards, there is very little difference between light arrows and heavy arrows when fired at the same velocity within this yardage. The below charts will bear out this fact.
20 Inch 300 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 43- 28- 20- 14- 11
20 Inch 400 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 42- 26- 18- 14- 11
Sight compensation of trajectory.
The sights on a crossbow compensate for arrow drop by their installed height and not all sights are installed at the same height so not all crossbows shoot the exact same trajectory in appearance. Scope sights have an advantage as they can easily be raised higher above the flight rail by simply installing higher rings, when this is done the crossbow will sight-in differently and appear to have a flatter trajectory, which is a good thing.
Sighting-in your crossbow properly to compensate trajectory.
When you properly sight-in your crossbow for hunting you want to have a flat trajectory, the flatter the better. To achieve this the arrow will actually intersect with the line of sight twice, giving you a dead center hold on the target for many yards without hold-over or hold-under.
Four terms to know when properly sighting in a Crossbow.
1. Point Blank Range; Point blank range when sighting in a crossbow is the first point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
2. Mid-Range Rise; Mid-range rise when sighting in a crossbow is the highest point in the arrows trajectory between the point blank range and the true zero point.
3. True Zero; True zero when sighting in a crossbow is the second point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
4. Maximum Point Blank Range; Maximum point blank range when sighting in a crossbow is the height of the mid-range rise and the arrow drop beyond true zero, both are equal in measure.
Below are some common sight-in ranges to help you find a good zeroing in point. Also these are for low mounted scopes and most peep and pin sights.
Trajectory For A 10 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards0000020 Yards- 8- 5- 4- 3- 230 Yards- 26- 16- 11- 8- 6
Trajectory For A 15 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 2+ 1+ 1+ 1+ 020 Yards- 4- 3- 2- 1- 130 Yards- 20- 12- 9- 6- 5
Trajectory For A 20 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 4+ 3+ 2+ 1+ 120 Yards0000030 Yards- 13- 8- 5- 4- 3
Trajectory For A 25 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 7+ 4+ 3+ 2+ 220 Yards+ 4+ 3+ 2+ 1+ 130 Yards- 7- 4- 3- 2- 2
Putting it all into perspective.
If you look at the above chart you will notice that from 250 F.P.S. - 400 F.P.S. there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. This is very misleading as to what a true high performance crossbow will do when sighted in properly for deer hunting.
Bowhunting of any kind is a short range affair and is best kept under 35 Yards.
Do you really need a multi range sight for trajectory compensation.
The size of the heart/lung area is around 8 inches on a average size deer weighing 120 pounds. With having said that lets sight these crossbows with a maximum point blank range drop of 3 inches and a mid-range rise of 3 inches.
As you can see by the above picture you hold dead center of the target and the arrow will strike the vitals of a normal sized deer by proper sight setting, compensating the arrow trajectory correctly.
Sighting-In to achieve maximum point blank range.
200 Feet Per Second Maximum Point Blank Range, 22 Yards.5 Yards10 Yards15 Yards18 Yards20 Yards22 Yards+ 3+ 3+ 20- 2- 3
250 Feet Per Second Maximum Point Blank Range, 25 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards+ 2+ 3+ 20- 3
300 Feet Per Second Maximum Point Blank Range, 30 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards+ 2+ 3+ 3+ 20- 3
350 Feet Per Second Maximum Point Blank Range, 36 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards36 Yards+ 1+ 2+ 3+3+ 20- 2- 3
400 Feet Per Second Maximum Point Blank Range, 42 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards40 Yards42 Yards+ 1+ 2+ 3+ 3+ 3+ 20- 2- 3
Just remember that, because of arrow selection, sight selection, the speed of your own crossbow, you have to really shoot your crossbow at various ranges to map out its own true trajectory. This is only a guide to help you achieve the most effective use of your crossbow through the understanding of trajectory and proper sighting in procedure for hunting.
Copyright 2001 - 2010.Crossbow Arrow & Bolts, Trajectories.
What is trajectory.
In arrow flight, trajectory refers to the exact arcing path the arrow travels from the crossbow to the target downrange, as soon as the arrow leaves the power of the bowstring it is subjected to
atmosheric drag (slowing it down) and
gravity (pulling the arrow down to earth). As the arrow travels downrange it is constantly slowing down and dropping toward the ground, the further it travels, the faster it falls to the ground.
It's all about the velocity.
One of the first things to understanding crossbow arrow trajectories is what are the guiding principals that highten or flatten trajectories. To sum this up, it falls to one word velocity. When you look at the normal distance that deer are harvested with archery equipment, this would be from 10 yards to 30 yards, there is very little difference between light arrows and heavy arrows when fired at the same velocity within this yardage. The below charts will bear out this fact.
20 Inch 300 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 43- 28- 20- 14- 11
20 Inch 400 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 42- 26- 18- 14- 11
Sight compensation of trajectory.
The sights on a crossbow compensate for arrow drop by their installed height and not all sights are installed at the same height so not all crossbows shoot the exact same trajectory in appearance. Scope sights have an advantage as they can easily be raised higher above the flight rail by simply installing higher rings, when this is done the crossbow will sight-in differently and appear to have a flatter trajectory, which is a good thing.
Sighting-in your crossbow properly to compensate trajectory.
When you properly sight-in your crossbow for hunting you want to have a flat trajectory, the flatter the better. To achieve this the arrow will actually intersect with the line of sight twice, giving you a dead center hold on the target for many yards without hold-over or hold-under.
Four terms to know when properly sighting in a Crossbow.
1. Point Blank Range; Point blank range when sighting in a crossbow is the first point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
2. Mid-Range Rise; Mid-range rise when sighting in a crossbow is the highest point in the arrows trajectory between the point blank range and the true zero point.
3. True Zero; True zero when sighting in a crossbow is the second point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
4. Maximum Point Blank Range; Maximum point blank range when sighting in a crossbow is the height of the mid-range rise and the arrow drop beyond true zero, both are equal in measure.
Below are some common sight-in ranges to help you find a good zeroing in point. Also these are for low mounted scopes and most peep and pin sights.
Trajectory For A 10 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards0000020 Yards- 8- 5- 4- 3- 230 Yards- 26- 16- 11- 8- 6
Trajectory For A 15 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 2+ 1+ 1+ 1+ 020 Yards- 4- 3- 2- 1- 130 Yards- 20- 12- 9- 6- 5
Trajectory For A 20 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 4+ 3+ 2+ 1+ 120 Yards0000030 Yards- 13- 8- 5- 4- 3
Trajectory For A 25 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 7+ 4+ 3+ 2+ 220 Yards+ 4+ 3+ 2+ 1+ 130 Yards- 7- 4- 3- 2- 2
Putting it all into perspective.
If you look at the above chart you will notice that from 250 F.P.S. - 400 F.P.S. there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. This is very misleading as to what a true high performance crossbow will do when sighted in properly for deer hunting.
Bowhunting of any kind is a short range affair and is best kept under 35 Yards.
Do you really need a multi range sight for trajectory compensation.
The size of the heart/lung area is around 8 inches on a average size deer weighing 120 pounds. With having said that lets sight these crossbows with a maximum point blank range drop of 3 inches and a mid-range rise of 3 inches.
As you can see by the above picture you hold dead center of the target and the arrow will strike the vitals of a normal sized deer by proper sight setting, compensating the arrow trajectory correctly.
Sighting-In to achieve maximum point blank range.
200 Feet Per Second Maximum Point Blank Range, 22 Yards.5 Yards10 Yards15 Yards18 Yards20 Yards22 Yards+ 3+ 3+ 20- 2- 3
250 Feet Per Second Maximum Point Blank Range, 25 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards+ 2+ 3+ 20- 3
300 Feet Per Second Maximum Point Blank Range, 30 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards+ 2+ 3+ 3+ 20- 3
350 Feet Per Second Maximum Point Blank Range, 36 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards36 Yards+ 1+ 2+ 3+3+ 20- 2- 3
400 Feet Per Second Maximum Point Blank Range, 42 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards40 Yards42 Yards+ 1+ 2+ 3+ 3+ 3+ 20- 2- 3
Just remember that, because of arrow selection, sight selection, the speed of your own crossbow, you have to really shoot your crossbow at various ranges to map out its own true trajectory. This is only a guide to help you achieve the most effective use of your crossbow through the understanding of trajectory and proper sighting in procedure for hunting."
Copyright 2001 - 2010.
What is trajectory.
In arrow flight, trajectory refers to the exact arcing path the arrow travels from the crossbow to the target downrange, as soon as the arrow leaves the power of the bowstring it is subjected to
atmosheric drag (slowing it down) and
gravity (pulling the arrow down to earth). As the arrow travels downrange it is constantly slowing down and dropping toward the ground, the further it travels, the faster it falls to the ground.
It's all about the velocity.
One of the first things to understanding crossbow arrow trajectories is what are the guiding principals that highten or flatten trajectories. To sum this up, it falls to one word velocity. When you look at the normal distance that deer are harvested with archery equipment, this would be from 10 yards to 30 yards, there is very little difference between light arrows and heavy arrows when fired at the same velocity within this yardage. The below charts will bear out this fact.
20 Inch 300 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 43- 28- 20- 14- 11
20 Inch 400 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 42- 26- 18- 14- 11
Sight compensation of trajectory.
The sights on a crossbow compensate for arrow drop by their installed height and not all sights are installed at the same height so not all crossbows shoot the exact same trajectory in appearance. Scope sights have an advantage as they can easily be raised higher above the flight rail by simply installing higher rings, when this is done the crossbow will sight-in differently and appear to have a flatter trajectory, which is a good thing.
Sighting-in your crossbow properly to compensate trajectory.
When you properly sight-in your crossbow for hunting you want to have a flat trajectory, the flatter the better. To achieve this the arrow will actually intersect with the line of sight twice, giving you a dead center hold on the target for many yards without hold-over or hold-under.
Four terms to know when properly sighting in a Crossbow.
1. Point Blank Range; Point blank range when sighting in a crossbow is the first point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
2. Mid-Range Rise; Mid-range rise when sighting in a crossbow is the highest point in the arrows trajectory between the point blank range and the true zero point.
3. True Zero; True zero when sighting in a crossbow is the second point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
4. Maximum Point Blank Range; Maximum point blank range when sighting in a crossbow is the height of the mid-range rise and the arrow drop beyond true zero, both are equal in measure.
Below are some common sight-in ranges to help you find a good zeroing in point. Also these are for low mounted scopes and most peep and pin sights.
Trajectory For A 10 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards0000020 Yards- 8- 5- 4- 3- 230 Yards- 26- 16- 11- 8- 6
Trajectory For A 15 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 2+ 1+ 1+ 1+ 020 Yards- 4- 3- 2- 1- 130 Yards- 20- 12- 9- 6- 5
Trajectory For A 20 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 4+ 3+ 2+ 1+ 120 Yards0000030 Yards- 13- 8- 5- 4- 3
Trajectory For A 25 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 7+ 4+ 3+ 2+ 220 Yards+ 4+ 3+ 2+ 1+ 130 Yards- 7- 4- 3- 2- 2
Putting it all into perspective.
If you look at the above chart you will notice that from 250 F.P.S. - 400 F.P.S. there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. This is very misleading as to what a true high performance crossbow will do when sighted in properly for deer hunting.
Bowhunting of any kind is a short range affair and is best kept under 35 Yards.
Do you really need a multi range sight for trajectory compensation.
The size of the heart/lung area is around 8 inches on a average size deer weighing 120 pounds. With having said that lets sight these crossbows with a maximum point blank range drop of 3 inches and a mid-range rise of 3 inches.
As you can see by the above picture you hold dead center of the target and the arrow will strike the vitals of a normal sized deer by proper sight setting, compensating the arrow trajectory correctly.
Sighting-In to achieve maximum point blank range.
200 Feet Per Second Maximum Point Blank Range, 22 Yards.5 Yards10 Yards15 Yards18 Yards20 Yards22 Yards+ 3+ 3+ 20- 2- 3
250 Feet Per Second Maximum Point Blank Range, 25 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards+ 2+ 3+ 20- 3
300 Feet Per Second Maximum Point Blank Range, 30 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards+ 2+ 3+ 3+ 20- 3
350 Feet Per Second Maximum Point Blank Range, 36 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards36 Yards+ 1+ 2+ 3+3+ 20- 2- 3
400 Feet Per Second Maximum Point Blank Range, 42 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards40 Yards42 Yards+ 1+ 2+ 3+ 3+ 3+ 20- 2- 3
Just remember that, because of arrow selection, sight selection, the speed of your own crossbow, you have to really shoot your crossbow at various ranges to map out its own true trajectory. This is only a guide to help you achieve the most effective use of your crossbow through the understanding of trajectory and proper sighting in procedure for hunting.
Copyright 2001 - 2010.Crossbow Arrow & Bolts, Trajectories.
What is trajectory.
In arrow flight, trajectory refers to the exact arcing path the arrow travels from the crossbow to the target downrange, as soon as the arrow leaves the power of the bowstring it is subjected to
atmosheric drag (slowing it down) and
gravity (pulling the arrow down to earth). As the arrow travels downrange it is constantly slowing down and dropping toward the ground, the further it travels, the faster it falls to the ground.
It's all about the velocity.
One of the first things to understanding crossbow arrow trajectories is what are the guiding principals that highten or flatten trajectories. To sum this up, it falls to one word velocity. When you look at the normal distance that deer are harvested with archery equipment, this would be from 10 yards to 30 yards, there is very little difference between light arrows and heavy arrows when fired at the same velocity within this yardage. The below charts will bear out this fact.
20 Inch 300 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 43- 28- 20- 14- 11
20 Inch 400 Grain Crossbow Arrow (Actual Drop)Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards- 5- 3- 2- 1- 120 Yards- 18- 12- 8- 6- 530 Yards- 42- 26- 18- 14- 11
Sight compensation of trajectory.
The sights on a crossbow compensate for arrow drop by their installed height and not all sights are installed at the same height so not all crossbows shoot the exact same trajectory in appearance. Scope sights have an advantage as they can easily be raised higher above the flight rail by simply installing higher rings, when this is done the crossbow will sight-in differently and appear to have a flatter trajectory, which is a good thing.
Sighting-in your crossbow properly to compensate trajectory.
When you properly sight-in your crossbow for hunting you want to have a flat trajectory, the flatter the better. To achieve this the arrow will actually intersect with the line of sight twice, giving you a dead center hold on the target for many yards without hold-over or hold-under.
Four terms to know when properly sighting in a Crossbow.
1. Point Blank Range; Point blank range when sighting in a crossbow is the first point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
2. Mid-Range Rise; Mid-range rise when sighting in a crossbow is the highest point in the arrows trajectory between the point blank range and the true zero point.
3. True Zero; True zero when sighting in a crossbow is the second point at which the line of sight intersects with the arrows path in the arrows trajectory arc.
4. Maximum Point Blank Range; Maximum point blank range when sighting in a crossbow is the height of the mid-range rise and the arrow drop beyond true zero, both are equal in measure.
Below are some common sight-in ranges to help you find a good zeroing in point. Also these are for low mounted scopes and most peep and pin sights.
Trajectory For A 10 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards0000020 Yards- 8- 5- 4- 3- 230 Yards- 26- 16- 11- 8- 6
Trajectory For A 15 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 2+ 1+ 1+ 1+ 020 Yards- 4- 3- 2- 1- 130 Yards- 20- 12- 9- 6- 5
Trajectory For A 20 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 4+ 3+ 2+ 1+ 120 Yards0000030 Yards- 13- 8- 5- 4- 3
Trajectory For A 25 Yard Sight-In Using 300 - 400 Grain Weight Arrow.Range/Velocity200 f.p.s.250 f.p.s.300 f.p.s.350 f.p.s.400 f.p.s.10 Yards+ 7+ 4+ 3+ 2+ 220 Yards+ 4+ 3+ 2+ 1+ 130 Yards- 7- 4- 3- 2- 2
Putting it all into perspective.
If you look at the above chart you will notice that from 250 F.P.S. - 400 F.P.S. there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. This is very misleading as to what a true high performance crossbow will do when sighted in properly for deer hunting.
Bowhunting of any kind is a short range affair and is best kept under 35 Yards.
Do you really need a multi range sight for trajectory compensation.
The size of the heart/lung area is around 8 inches on a average size deer weighing 120 pounds. With having said that lets sight these crossbows with a maximum point blank range drop of 3 inches and a mid-range rise of 3 inches.
As you can see by the above picture you hold dead center of the target and the arrow will strike the vitals of a normal sized deer by proper sight setting, compensating the arrow trajectory correctly.
Sighting-In to achieve maximum point blank range.
200 Feet Per Second Maximum Point Blank Range, 22 Yards.5 Yards10 Yards15 Yards18 Yards20 Yards22 Yards+ 3+ 3+ 20- 2- 3
250 Feet Per Second Maximum Point Blank Range, 25 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards+ 2+ 3+ 20- 3
300 Feet Per Second Maximum Point Blank Range, 30 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards+ 2+ 3+ 3+ 20- 3
350 Feet Per Second Maximum Point Blank Range, 36 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards36 Yards+ 1+ 2+ 3+3+ 20- 2- 3
400 Feet Per Second Maximum Point Blank Range, 42 Yards.5 Yards10 Yards15 Yards20 Yards25 Yards30 Yards35 Yards40 Yards42 Yards+ 1+ 2+ 3+ 3+ 3+ 20- 2- 3
Just remember that, because of arrow selection, sight selection, the speed of your own crossbow, you have to really shoot your crossbow at various ranges to map out its own true trajectory. This is only a guide to help you achieve the most effective use of your crossbow through the understanding of trajectory and proper sighting in procedure for hunting."
Copyright 2001 - 2010.
Edited by HighlandHunter, 22 January 2012 - 10:43 PM.
Cliff
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
#4
CaptainiJim
-
- Members
- 6 posts
Newbie
Posted 22 January 2012 - 11:09 PM
WOW! - Thanks... not all that different logic from bullet drop down range. Just difference in velocity. Thanks again. I'll use this.
#5
wapster
-
- Members
- 35 posts
Member
Posted 23 January 2012 - 02:04 PM
Crossbow Arrow & Bolts, Velocity & Drop.
You can increase crossbow arrow speed by reducing total crossbow arrow weight, but only on crossbows that are not arrow weight sensitive, such as Barnett Crossbows. Each 5 grain reduction in arrow weight provides a speed increase of about 1 foot per second. Thus, if you reduce arrow weight by 100 grains, you increase speed by roughly 20 feet per second. By reducing arrow weight you effectively increase arrow speed which directly affects crossbow arrow drop at a given range.
Just how profound can this arrow drop be, EXAMPLE; we'll say that you are shooting an 20 Inch Easton 2219 aluminum shaft with a 150 grain arrow point, velocity is 250 feet per second. You have been doing a lot of reading lately and you read that Easton has a new crossbow arrow out called the Easton Carbon PowerBolt and that they recommend a 100 grain arrow point for correct F.O.C., so you try them out. There is approximately 135 grain arrow weight difference, with the PowerBolt being lighter. The arrow drop difference between the 2 at 50 yards is 10 inches.
Arrow Velocity - 200 Feet Per Second.
Range, 5 Yards = 1.10 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 3.25 Inch Arrow Drop.
Range, 20 Yards = 8.70 Inch Arrow Drop.
Range, 25 Yards = 16.30 Inch Arrow Drop.
Range, 30 Yards = 26.10 Inch Arrow Drop.
Range, 35 Yards = 38.10 Inch Arrow Drop.
Range, 40 Yards = 52.20 Inch Arrow Drop.
Range, 45 Yards = 68.50 Inch Arrow Drop.
Range, 50 Yards = 87.00 Inch Arrow Drop.
Arrow Velocity - 225 Feet Per Second.
Range, 5 Yards = .90 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 2.60 Inch Arrow Drop.
Range, 20 Yards = 6.90 Inch Arrow Drop.
Range, 25 Yards = 12.90 Inch Arrow Drop.
Range, 30 Yards = 20.60 Inch Arrow Drop.
Range, 35 Yards = 30.10 Inch Arrow Drop.
Range, 40 Yards = 41.20 Inch Arrow Drop.
Range, 45 Yards = 54.00 Inch Arrow Drop.
Range, 50 Yards = 69.00 Inch Arrow Drop.
Arrow Velocity - 250 Feet Per Second.
Range, 5 Yards = .70 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 2.10 Inch Arrow Drop.
Range, 20 Yards = 5.60 Inch Arrow Drop.
Range, 25 Yards = 10.40 Inch Arrow Drop.
Range, 30 Yards = 16.70 Inch Arrow Drop.
Range, 35 Yards = 24.30 Inch Arrow Drop.
Range, 40 Yards = 33.40 Inch Arrow Drop.
Range, 45 Yards = 44.00 Inch Arrow Drop.
Range, 50 Yards = 55.60 Inch Arrow Drop.
Arrow Velocity - 275 Feet Per Second.
Range, 5 Yards = .60 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.70 Inch Arrow Drop.
Range, 20 Yards = 4.60 Inch Arrow Drop.
Range, 25 Yards = 8.60 Inch Arrow Drop.
Range, 30 Yards = 13.80 Inch Arrow Drop.
Range, 35 Yards = 20.10 Inch Arrow Drop.
Range, 40 Yards = 27.60 Inch Arrow Drop.
Range, 45 Yards = 36.20 Inch Arrow Drop.
Range, 50 Yards = 46.00 Inch Arrow Drop.
Arrow Velocity - 280 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.70 Inch Arrow Drop.
Range, 20 Yards = 4.50 Inch Arrow Drop.
Range, 25 Yards = 8.30 Inch Arrow Drop.
Range, 30 Yards = 13.30 Inch Arrow Drop.
Range, 35 Yards = 19.40 Inch Arrow Drop.
Range, 40 Yards = 26.60 Inch Arrow Drop.
Range, 45 Yards = 35.00 Inch Arrow Drop.
Range, 50 Yards = 44.30 Inch Arrow Drop.
Arrow Velocity - 285 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.60 Inch Arrow Drop.
Range, 20 Yards = 4.20 Inch Arrow Drop.
Range, 25 Yards = 8.00 Inch Arrow Drop.
Range, 30 Yards = 12.80 Inch Arrow Drop.
Range, 35 Yards = 18.70 Inch Arrow Drop.
Range, 40 Yards = 25.70 Inch Arrow Drop.
Range, 45 Yards = 33.70 Inch Arrow Drop.
Range, 50 Yards = 42.80 Inch Arrow Drop.
Arrow Velocity - 290 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.50 Inch Arrow Drop.
Range, 20 Yards = 4.10 Inch Arrow Drop.
Range, 25 Yards = 7.50 Inch Arrow Drop.
Range, 30 Yards = 12.40 Inch Arrow Drop.
Range, 35 Yards = 18.00 Inch Arrow Drop.
Range, 40 Yards = 24.80 Inch Arrow Drop.
Range, 45 Yards = 32.60 Inch Arrow Drop.
Range, 50 Yards = 41.30 Inch Arrow Drop.
Arrow Velocity - 295 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.50 Inch Arrow Drop.
Range, 20 Yards = 4.00 Inch Arrow Drop.
Range, 25 Yards = 7.50 Inch Arrow Drop.
Range, 30 Yards = 12.00 Inch Arrow Drop.
Range, 35 Yards = 17.50 Inch Arrow Drop.
Range, 40 Yards = 24.00 Inch Arrow Drop.
Range, 45 Yards = 31.50 Inch Arrow Drop.
Range, 50 Yards = 40.00 Inch Arrow Drop.
Arrow Velocity - 300 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.40 Inch Arrow Drop.
Range, 20 Yards = 3.90 Inch Arrow Drop.
Range, 25 Yards = 7.20 Inch Arrow Drop.
Range, 30 Yards = 11.60 Inch Arrow Drop.
Range, 35 Yards = 17.00 Inch Arrow Drop.
Range, 40 Yards = 23.20 Inch Arrow Drop.
Range, 45 Yards = 30.40 Inch Arrow Drop.
Range, 50 Yards = 38.60 Inch Arrow Drop.
Arrow Velocity - 305 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.40 Inch Arrow Drop.
Range, 20 Yards = 3.70 Inch Arrow Drop.
Range, 25 Yards = 7.00 Inch Arrow Drop.
Range, 30 Yards = 11.20 Inch Arrow Drop.
Range, 35 Yards = 16.30 Inch Arrow Drop.
Range, 40 Yards = 22.40 Inch Arrow Drop.
Range, 45 Yards = 29.40 Inch Arrow Drop.
Range, 50 Yards = 37.40 Inch Arrow Drop.
Arrow Velocity - 310 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.60 Inch Arrow Drop.
Range, 25 Yards = 6.80 Inch Arrow Drop.
Range, 30 Yards = 10.80 Inch Arrow Drop.
Range, 35 Yards = 15.80 Inch Arrow Drop.
Range, 40 Yards = 21.70 Inch Arrow Drop.
Range, 45 Yards = 28.50 Inch Arrow Drop.
Range, 50 Yards = 36.10 Inch Arrow Drop.
Arrow Velocity - 315 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.50 Inch Arrow Drop.
Range, 25 Yards = 6.60 Inch Arrow Drop.
Range, 30 Yards = 10.50 Inch Arrow Drop.
Range, 35 Yards = 15.30 Inch Arrow Drop.
Range, 40 Yards = 21.00 Inch Arrow Drop.
Range, 45 Yards = 27.60 Inch Arrow Drop.
Range, 50 Yards = 35.00 Inch Arrow Drop.
Arrow Velocity - 320 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.40 Inch Arrow Drop.
Range, 25 Yards = 6.40 Inch Arrow Drop.
Range, 30 Yards = 10.20 Inch Arrow Drop.
Range, 35 Yards = 14.80 Inch Arrow Drop.
Range, 40 Yards = 20.40 Inch Arrow Drop.
Range, 45 Yards = 26.70 Inch Arrow Drop.
Range, 50 Yards = 34.00 Inch Arrow Drop.
Arrow Velocity - 325 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.20 Inch Arrow Drop.
Range, 20 Yards = 3.30 Inch Arrow Drop.
Range, 25 Yards = 6.20 Inch Arrow Drop.
Range, 30 Yards = 9.90 Inch Arrow Drop.
Range, 35 Yards = 14.40 Inch Arrow Drop.
Range, 40 Yards = 19.80 Inch Arrow Drop.
Range, 45 Yards = 26.00 Inch Arrow Drop.
Range, 50 Yards = 32.90 Inch Arrow Drop.
Arrow Velocity - 330 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.20 Inch Arrow Drop.
Range, 20 Yards = 3.20 Inch Arrow Drop.
Range, 25 Yards = 6.00 Inch Arrow Drop.
Range, 30 Yards = 9.60 Inch Arrow Drop.
Range, 35 Yards = 14.00 Inch Arrow Drop.
Range, 40 Yards = 19.20 Inch Arrow Drop.
Range, 45 Yards = 25.00 Inch Arrow Drop.
Range, 50 Yards = 32.00 Inch Arrow Drop.
Arrow Velocity - 340 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.10 Inch Arrow Drop.
Range, 20 Yards = 3.00 Inch Arrow Drop.
Range, 25 Yards = 5.60 Inch Arrow Drop.
Range, 30 Yards = 9.00 Inch Arrow Drop.
Range, 35 Yards = 13.20 Inch Arrow Drop.
Range, 40 Yards = 18.00 Inch Arrow Drop.
Range, 45 Yards = 23.70 Inch Arrow Drop.
Range, 50 Yards = 30.10 Inch Arrow Drop.
Arrow Velocity - 350 Feet Per Second.
Range, 5 Yards = .35 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.10 Inch Arrow Drop.
Range, 20 Yards = 2.80 Inch Arrow Drop.
Range, 25 Yards = 5.30 Inch Arrow Drop.
Range, 30 Yards = 8.50 Inch Arrow Drop.
Range, 35 Yards = 12.40 Inch Arrow Drop.
Range, 40 Yards = 17.00 Inch Arrow Drop.
Range, 45 Yards = 22.40 Inch Arrow Drop.
Range, 50 Yards = 28.30 Inch Arrow Drop.
Arrow Velocity - 360 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.00 Inch Arrow Drop.
Range, 20 Yards = 2.70 Inch Arrow Drop.
Range, 25 Yards = 5.00 Inch Arrow Drop.
Range, 30 Yards = 8.00 Inch Arrow Drop.
Range, 35 Yards = 11.70 Inch Arrow Drop.
Range, 40 Yards = 16.10 Inch Arrow Drop.
Range, 45 Yards = 21.10 Inch Arrow Drop.
Range, 50 Yards = 26.80 Inch Arrow Drop.
Arrow Velocity - 370 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.50 Inch Arrow Drop.
Range, 25 Yards = 4.70 Inch Arrow Drop.
Range, 30 Yards = 7.60 Inch Arrow Drop.
Range, 35 Yards = 11.10 Inch Arrow Drop.
Range, 40 Yards = 15.20 Inch Arrow Drop.
Range, 45 Yards = 20.00 Inch Arrow Drop.
Range, 50 Yards = 25.40 Inch Arrow Drop.
Arrow Velocity - 375 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.50 Inch Arrow Drop.
Range, 25 Yards = 4.60 Inch Arrow Drop.
Range, 30 Yards = 7.40 Inch Arrow Drop.
Range, 35 Yards = 10.80 Inch Arrow Drop.
Range, 40 Yards = 14.80 Inch Arrow Drop.
Range, 45 Yards = 19.50 Inch Arrow Drop.
Range, 50 Yards = 24.70 Inch Arrow Drop.
Arrow Velocity - 380 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.40 Inch Arrow Drop.
Range, 25 Yards = 4.50 Inch Arrow Drop.
Range, 30 Yards = 7.20 Inch Arrow Drop.
Range, 35 Yards = 10.50 Inch Arrow Drop.
Range, 40 Yards = 14.40 Inch Arrow Drop.
Range, 45 Yards = 18.90 Inch Arrow Drop.
Range, 50 Yards = 24.10 Inch Arrow Drop.
Arrow Velocity - 390 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .80 Inch Arrow Drop.
Range, 20 Yards = 2.30 Inch Arrow Drop.
Range, 25 Yards = 4.20 Inch Arrow Drop.
Range, 30 Yards = 6.80 Inch Arrow Drop.
Range, 35 Yards = 10.00 Inch Arrow Drop.
Range, 40 Yards = 13.70 Inch Arrow Drop.
Range, 45 Yards = 18.00 Inch Arrow Drop.
Range, 50 Yards = 22.80 Inch Arrow Drop.
Arrow Velocity - 400 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.20 Inch Arrow Drop.
Range, 25 Yards = 4.10 Inch Arrow Drop.
Range, 30 Yards = 6.50 Inch Arrow Drop.
Range, 35 Yards = 9.50 Inch Arrow Drop.
Range, 40 Yards = 13.00 Inch Arrow Drop.
Range, 45 Yards = 17.10 Inch Arrow Drop.
Range, 50 Yards = 22.00 Inch Arrow Drop.
hers some more fun filled facts to look at.......
You can increase crossbow arrow speed by reducing total crossbow arrow weight, but only on crossbows that are not arrow weight sensitive, such as Barnett Crossbows. Each 5 grain reduction in arrow weight provides a speed increase of about 1 foot per second. Thus, if you reduce arrow weight by 100 grains, you increase speed by roughly 20 feet per second. By reducing arrow weight you effectively increase arrow speed which directly affects crossbow arrow drop at a given range.
Just how profound can this arrow drop be, EXAMPLE; we'll say that you are shooting an 20 Inch Easton 2219 aluminum shaft with a 150 grain arrow point, velocity is 250 feet per second. You have been doing a lot of reading lately and you read that Easton has a new crossbow arrow out called the Easton Carbon PowerBolt and that they recommend a 100 grain arrow point for correct F.O.C., so you try them out. There is approximately 135 grain arrow weight difference, with the PowerBolt being lighter. The arrow drop difference between the 2 at 50 yards is 10 inches.
Arrow Velocity - 200 Feet Per Second.
Range, 5 Yards = 1.10 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 3.25 Inch Arrow Drop.
Range, 20 Yards = 8.70 Inch Arrow Drop.
Range, 25 Yards = 16.30 Inch Arrow Drop.
Range, 30 Yards = 26.10 Inch Arrow Drop.
Range, 35 Yards = 38.10 Inch Arrow Drop.
Range, 40 Yards = 52.20 Inch Arrow Drop.
Range, 45 Yards = 68.50 Inch Arrow Drop.
Range, 50 Yards = 87.00 Inch Arrow Drop.
Arrow Velocity - 225 Feet Per Second.
Range, 5 Yards = .90 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 2.60 Inch Arrow Drop.
Range, 20 Yards = 6.90 Inch Arrow Drop.
Range, 25 Yards = 12.90 Inch Arrow Drop.
Range, 30 Yards = 20.60 Inch Arrow Drop.
Range, 35 Yards = 30.10 Inch Arrow Drop.
Range, 40 Yards = 41.20 Inch Arrow Drop.
Range, 45 Yards = 54.00 Inch Arrow Drop.
Range, 50 Yards = 69.00 Inch Arrow Drop.
Arrow Velocity - 250 Feet Per Second.
Range, 5 Yards = .70 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 2.10 Inch Arrow Drop.
Range, 20 Yards = 5.60 Inch Arrow Drop.
Range, 25 Yards = 10.40 Inch Arrow Drop.
Range, 30 Yards = 16.70 Inch Arrow Drop.
Range, 35 Yards = 24.30 Inch Arrow Drop.
Range, 40 Yards = 33.40 Inch Arrow Drop.
Range, 45 Yards = 44.00 Inch Arrow Drop.
Range, 50 Yards = 55.60 Inch Arrow Drop.
Arrow Velocity - 275 Feet Per Second.
Range, 5 Yards = .60 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.70 Inch Arrow Drop.
Range, 20 Yards = 4.60 Inch Arrow Drop.
Range, 25 Yards = 8.60 Inch Arrow Drop.
Range, 30 Yards = 13.80 Inch Arrow Drop.
Range, 35 Yards = 20.10 Inch Arrow Drop.
Range, 40 Yards = 27.60 Inch Arrow Drop.
Range, 45 Yards = 36.20 Inch Arrow Drop.
Range, 50 Yards = 46.00 Inch Arrow Drop.
Arrow Velocity - 280 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.70 Inch Arrow Drop.
Range, 20 Yards = 4.50 Inch Arrow Drop.
Range, 25 Yards = 8.30 Inch Arrow Drop.
Range, 30 Yards = 13.30 Inch Arrow Drop.
Range, 35 Yards = 19.40 Inch Arrow Drop.
Range, 40 Yards = 26.60 Inch Arrow Drop.
Range, 45 Yards = 35.00 Inch Arrow Drop.
Range, 50 Yards = 44.30 Inch Arrow Drop.
Arrow Velocity - 285 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.60 Inch Arrow Drop.
Range, 20 Yards = 4.20 Inch Arrow Drop.
Range, 25 Yards = 8.00 Inch Arrow Drop.
Range, 30 Yards = 12.80 Inch Arrow Drop.
Range, 35 Yards = 18.70 Inch Arrow Drop.
Range, 40 Yards = 25.70 Inch Arrow Drop.
Range, 45 Yards = 33.70 Inch Arrow Drop.
Range, 50 Yards = 42.80 Inch Arrow Drop.
Arrow Velocity - 290 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.50 Inch Arrow Drop.
Range, 20 Yards = 4.10 Inch Arrow Drop.
Range, 25 Yards = 7.50 Inch Arrow Drop.
Range, 30 Yards = 12.40 Inch Arrow Drop.
Range, 35 Yards = 18.00 Inch Arrow Drop.
Range, 40 Yards = 24.80 Inch Arrow Drop.
Range, 45 Yards = 32.60 Inch Arrow Drop.
Range, 50 Yards = 41.30 Inch Arrow Drop.
Arrow Velocity - 295 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.50 Inch Arrow Drop.
Range, 20 Yards = 4.00 Inch Arrow Drop.
Range, 25 Yards = 7.50 Inch Arrow Drop.
Range, 30 Yards = 12.00 Inch Arrow Drop.
Range, 35 Yards = 17.50 Inch Arrow Drop.
Range, 40 Yards = 24.00 Inch Arrow Drop.
Range, 45 Yards = 31.50 Inch Arrow Drop.
Range, 50 Yards = 40.00 Inch Arrow Drop.
Arrow Velocity - 300 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.40 Inch Arrow Drop.
Range, 20 Yards = 3.90 Inch Arrow Drop.
Range, 25 Yards = 7.20 Inch Arrow Drop.
Range, 30 Yards = 11.60 Inch Arrow Drop.
Range, 35 Yards = 17.00 Inch Arrow Drop.
Range, 40 Yards = 23.20 Inch Arrow Drop.
Range, 45 Yards = 30.40 Inch Arrow Drop.
Range, 50 Yards = 38.60 Inch Arrow Drop.
Arrow Velocity - 305 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.40 Inch Arrow Drop.
Range, 20 Yards = 3.70 Inch Arrow Drop.
Range, 25 Yards = 7.00 Inch Arrow Drop.
Range, 30 Yards = 11.20 Inch Arrow Drop.
Range, 35 Yards = 16.30 Inch Arrow Drop.
Range, 40 Yards = 22.40 Inch Arrow Drop.
Range, 45 Yards = 29.40 Inch Arrow Drop.
Range, 50 Yards = 37.40 Inch Arrow Drop.
Arrow Velocity - 310 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.60 Inch Arrow Drop.
Range, 25 Yards = 6.80 Inch Arrow Drop.
Range, 30 Yards = 10.80 Inch Arrow Drop.
Range, 35 Yards = 15.80 Inch Arrow Drop.
Range, 40 Yards = 21.70 Inch Arrow Drop.
Range, 45 Yards = 28.50 Inch Arrow Drop.
Range, 50 Yards = 36.10 Inch Arrow Drop.
Arrow Velocity - 315 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.50 Inch Arrow Drop.
Range, 25 Yards = 6.60 Inch Arrow Drop.
Range, 30 Yards = 10.50 Inch Arrow Drop.
Range, 35 Yards = 15.30 Inch Arrow Drop.
Range, 40 Yards = 21.00 Inch Arrow Drop.
Range, 45 Yards = 27.60 Inch Arrow Drop.
Range, 50 Yards = 35.00 Inch Arrow Drop.
Arrow Velocity - 320 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.30 Inch Arrow Drop.
Range, 20 Yards = 3.40 Inch Arrow Drop.
Range, 25 Yards = 6.40 Inch Arrow Drop.
Range, 30 Yards = 10.20 Inch Arrow Drop.
Range, 35 Yards = 14.80 Inch Arrow Drop.
Range, 40 Yards = 20.40 Inch Arrow Drop.
Range, 45 Yards = 26.70 Inch Arrow Drop.
Range, 50 Yards = 34.00 Inch Arrow Drop.
Arrow Velocity - 325 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.20 Inch Arrow Drop.
Range, 20 Yards = 3.30 Inch Arrow Drop.
Range, 25 Yards = 6.20 Inch Arrow Drop.
Range, 30 Yards = 9.90 Inch Arrow Drop.
Range, 35 Yards = 14.40 Inch Arrow Drop.
Range, 40 Yards = 19.80 Inch Arrow Drop.
Range, 45 Yards = 26.00 Inch Arrow Drop.
Range, 50 Yards = 32.90 Inch Arrow Drop.
Arrow Velocity - 330 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.20 Inch Arrow Drop.
Range, 20 Yards = 3.20 Inch Arrow Drop.
Range, 25 Yards = 6.00 Inch Arrow Drop.
Range, 30 Yards = 9.60 Inch Arrow Drop.
Range, 35 Yards = 14.00 Inch Arrow Drop.
Range, 40 Yards = 19.20 Inch Arrow Drop.
Range, 45 Yards = 25.00 Inch Arrow Drop.
Range, 50 Yards = 32.00 Inch Arrow Drop.
Arrow Velocity - 340 Feet Per Second.
Range, 5 Yards = .40 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.10 Inch Arrow Drop.
Range, 20 Yards = 3.00 Inch Arrow Drop.
Range, 25 Yards = 5.60 Inch Arrow Drop.
Range, 30 Yards = 9.00 Inch Arrow Drop.
Range, 35 Yards = 13.20 Inch Arrow Drop.
Range, 40 Yards = 18.00 Inch Arrow Drop.
Range, 45 Yards = 23.70 Inch Arrow Drop.
Range, 50 Yards = 30.10 Inch Arrow Drop.
Arrow Velocity - 350 Feet Per Second.
Range, 5 Yards = .35 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.10 Inch Arrow Drop.
Range, 20 Yards = 2.80 Inch Arrow Drop.
Range, 25 Yards = 5.30 Inch Arrow Drop.
Range, 30 Yards = 8.50 Inch Arrow Drop.
Range, 35 Yards = 12.40 Inch Arrow Drop.
Range, 40 Yards = 17.00 Inch Arrow Drop.
Range, 45 Yards = 22.40 Inch Arrow Drop.
Range, 50 Yards = 28.30 Inch Arrow Drop.
Arrow Velocity - 360 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = 1.00 Inch Arrow Drop.
Range, 20 Yards = 2.70 Inch Arrow Drop.
Range, 25 Yards = 5.00 Inch Arrow Drop.
Range, 30 Yards = 8.00 Inch Arrow Drop.
Range, 35 Yards = 11.70 Inch Arrow Drop.
Range, 40 Yards = 16.10 Inch Arrow Drop.
Range, 45 Yards = 21.10 Inch Arrow Drop.
Range, 50 Yards = 26.80 Inch Arrow Drop.
Arrow Velocity - 370 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.50 Inch Arrow Drop.
Range, 25 Yards = 4.70 Inch Arrow Drop.
Range, 30 Yards = 7.60 Inch Arrow Drop.
Range, 35 Yards = 11.10 Inch Arrow Drop.
Range, 40 Yards = 15.20 Inch Arrow Drop.
Range, 45 Yards = 20.00 Inch Arrow Drop.
Range, 50 Yards = 25.40 Inch Arrow Drop.
Arrow Velocity - 375 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.50 Inch Arrow Drop.
Range, 25 Yards = 4.60 Inch Arrow Drop.
Range, 30 Yards = 7.40 Inch Arrow Drop.
Range, 35 Yards = 10.80 Inch Arrow Drop.
Range, 40 Yards = 14.80 Inch Arrow Drop.
Range, 45 Yards = 19.50 Inch Arrow Drop.
Range, 50 Yards = 24.70 Inch Arrow Drop.
Arrow Velocity - 380 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.40 Inch Arrow Drop.
Range, 25 Yards = 4.50 Inch Arrow Drop.
Range, 30 Yards = 7.20 Inch Arrow Drop.
Range, 35 Yards = 10.50 Inch Arrow Drop.
Range, 40 Yards = 14.40 Inch Arrow Drop.
Range, 45 Yards = 18.90 Inch Arrow Drop.
Range, 50 Yards = 24.10 Inch Arrow Drop.
Arrow Velocity - 390 Feet Per Second.
Range, 5 Yards = .30 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .80 Inch Arrow Drop.
Range, 20 Yards = 2.30 Inch Arrow Drop.
Range, 25 Yards = 4.20 Inch Arrow Drop.
Range, 30 Yards = 6.80 Inch Arrow Drop.
Range, 35 Yards = 10.00 Inch Arrow Drop.
Range, 40 Yards = 13.70 Inch Arrow Drop.
Range, 45 Yards = 18.00 Inch Arrow Drop.
Range, 50 Yards = 22.80 Inch Arrow Drop.
Arrow Velocity - 400 Feet Per Second.
Range, 5 Yards = .50 Inches High.
Range, 10 Yards = Zero.
Range, 15 Yards = .90 Inch Arrow Drop.
Range, 20 Yards = 2.20 Inch Arrow Drop.
Range, 25 Yards = 4.10 Inch Arrow Drop.
Range, 30 Yards = 6.50 Inch Arrow Drop.
Range, 35 Yards = 9.50 Inch Arrow Drop.
Range, 40 Yards = 13.00 Inch Arrow Drop.
Range, 45 Yards = 17.10 Inch Arrow Drop.
Range, 50 Yards = 22.00 Inch Arrow Drop.
hers some more fun filled facts to look at.......
#6
FuzzyFultz
-
- Members
- 537 posts
Advanced Member
- LocationRowan, Kentucky
Posted 23 January 2012 - 09:45 PM
Everything you will need to know is here. This was very helpful for me. Hope it helps you.
http://www.crossbowm...htm.energy.html
http://www.crossbowm...htm.energy.html
James (Fuzzy)*I would like to see Kentucky become full inclusive of the crossbow*
......................"Without hunting, a mans soul seems to shrivel a little." Quote from Hankenhunter 3/12/2012.............................
2011 Parker Cyclone Express - Parker Arrows - Sling - Rope cocker - Hawke SR Illuminated scope - 100 gr G5 Montec Broaheads...
Two Mathews MQ-1s - One set at 63 LB for deer and one at 50 LB for turkey.... Easton Axis arrows and also Carbon Express Arrows....100 grain G5 Montec Broadheads....Peep with Extreme Archery Sites...
......................"Without hunting, a mans soul seems to shrivel a little." Quote from Hankenhunter 3/12/2012.............................
2011 Parker Cyclone Express - Parker Arrows - Sling - Rope cocker - Hawke SR Illuminated scope - 100 gr G5 Montec Broaheads...
Two Mathews MQ-1s - One set at 63 LB for deer and one at 50 LB for turkey.... Easton Axis arrows and also Carbon Express Arrows....100 grain G5 Montec Broadheads....Peep with Extreme Archery Sites...
#7
CaptainiJim
-
- Members
- 6 posts
Newbie
Posted 26 January 2012 - 10:29 AM
This is all super good info and exactly what I expected from folks that know.
Wapster - I shoot (now - just got it and love the looks and feel of it) a Barnett Predator. 375 fps - Book says 22" carbons weight: 445 grains minimum I intend to use 125gr tips as opposed to 100gr for added whap/knock down power.
How would I interpret your chart with my detail? You indicate Barnett is not weight sensitive.
Wapster - I shoot (now - just got it and love the looks and feel of it) a Barnett Predator. 375 fps - Book says 22" carbons weight: 445 grains minimum I intend to use 125gr tips as opposed to 100gr for added whap/knock down power.
How would I interpret your chart with my detail? You indicate Barnett is not weight sensitive.
#8
Highlander
-
- Members
- 837 posts
I Didn't Do It
- LocationHighland, Maryland
Posted 26 January 2012 - 10:51 AM
If you add more weight to the bolt (100 vs 125 grain broadhead) you will slow the bolt down a bit which would result in lower impact points at all yardages proportional to the distance. However, you will increase the energy of the impact a bit (the total thud). Most crossbows have more speed than compound bows, whether the extra energy is needed is debatable.
Of concern also is that the extra weight of the broadhead will throw the balance of the total bolt off. Meaning if you were to balance the bolt with broadhead on a small thin object somewhere around the center of the shaft, this balancing point will be thrown off. There are recommendations and formulas for the approximate point where the bolt should balance in reference to the center point as you measure it. This will impact how the bolt travels thought the air and will also impact the accuracy of the bolt.This is where adding and subtracting small amounts of weights to the bolt to get the most accuracy comes into play. High end competative shooters get into this aspect of the sport, but it does get somewhat complicated. If the balancing point is thrown off enough, you will see the result in how the arrow lands when it hits a target. Instead of hitting straight it may hit at an angle which looks kind of wierd when you go to pull the bolt out of the target. This is difficult to see with crossbow, sense you get the arrows buried in the target so deep. I'm not sure how you deal with this aspect for crossbow compared to compound bow for the reason you can't see how the bolt lands when buried. Perhaps others may have suggestions for this. HTH
Of concern also is that the extra weight of the broadhead will throw the balance of the total bolt off. Meaning if you were to balance the bolt with broadhead on a small thin object somewhere around the center of the shaft, this balancing point will be thrown off. There are recommendations and formulas for the approximate point where the bolt should balance in reference to the center point as you measure it. This will impact how the bolt travels thought the air and will also impact the accuracy of the bolt.This is where adding and subtracting small amounts of weights to the bolt to get the most accuracy comes into play. High end competative shooters get into this aspect of the sport, but it does get somewhat complicated. If the balancing point is thrown off enough, you will see the result in how the arrow lands when it hits a target. Instead of hitting straight it may hit at an angle which looks kind of wierd when you go to pull the bolt out of the target. This is difficult to see with crossbow, sense you get the arrows buried in the target so deep. I'm not sure how you deal with this aspect for crossbow compared to compound bow for the reason you can't see how the bolt lands when buried. Perhaps others may have suggestions for this. HTH
Edited by HighlandHunter, 26 January 2012 - 11:02 AM.
Cliff
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
#9
Highlander
-
- Members
- 837 posts
I Didn't Do It
- LocationHighland, Maryland
Posted 26 January 2012 - 11:08 AM
One thing that comes to mind and I have not tried this yet since I am new to crossbows is that if you practice out a longer ranges, say around 60 yards, there will not be as much penetration into the xbow target by the bolt. You could then see how the bolt flies by impact. The further out you shoot, the more this aspect comes into play.
Cliff
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
#10
Highlander
-
- Members
- 837 posts
I Didn't Do It
- LocationHighland, Maryland
Posted 26 January 2012 - 11:39 AM
This article provides much more detail:
Crossbow Broadheads, Tuning For Superior Accuracy:
If you're using fixed blade broadheads out of a crossbow, tuning the broadhead is critical and while it may seem frustrating to do this, the rewards of doing so will be less time wasted looking for bad hit animals and more meat in the freezer.
A shorter crossbow arrow has less ability to stabilize in flight than a longer arrow.
Most crossbowmen will use mechanical heads as a shortcut instead of tuning their arrows. This is not an acceptable short cut to trying a number of fixed blade broadheads to see which ones fly the best.
Simply put mechanical heads waste 25 to 50 percent of an arrow's penetrating energy just to open up and crossbow arrows are light thus giving up much needed energy to effectively open a mechanical broadhead. The butterfly action of these heads plus their long noses combine to create high penetrating friction.
The other detracting factor to mechanical broadheads is, the blades are not supported at the rear when open and they can easily fold or snap on impact with bone or even heavy ribs.
Our Extensive Crossbow Arrow Testing Made Light Of These Facts:
1. Anything less than 5" fletching length, on short crossbow arrows 15"-22" length, the arrows will not satisfactorily stabilize in flight, for excellent short and long range distance accuracy "period".
2. Penetration and accuracies went hand in hand by arrow length with well made three bladed broadheads as follows;
15"-18" arrows 7/8"-1" cutting diameter
18"-20" arrows 1"-1 1/16" cutting diameter
20"-22" arrows 1 1/16"-1 1/8" cutting diameter.
3. Alignment of the fletching and the blades resulted in an increase that was very measurable of accuracy at longer ranges or more distant targets.
4. Centrifugal force and run-out alignment test of arrows with broadheads and field points resulted in higher yields of pinpoint accuracy than the usual wobble test.
5. Front Of Center (ie; f.o.c.) arrow weight distribution for short crossbow arrows heavily favors 12.5% for superior accuracy and penetraion, at just 8% or 16% accuracy and flat trajectory flight falls off to the point it is noticable on distant targets including loss of penetration.
6. Of all the crossbow arrows and crossbow arrow manufacturers we tested, the new Beman ICS Carbon LightningBolt with ViBrake inserts required very little adjustment using quality 100 grain field points and quality 100 grain broadheads turning in excellent results with many different velocity crossbows.
7. Of all the broadheads and broadhead manufacturers in penetration tests and accuracy tests, the Trophy Ridge Ultimate Steel Broadheads performed almost to perfection.
8. By using quality; crossbow arrows and components thereof, we achieved extreme accuracy and tested up to a velocity of 340 feet per second with little effort and only minor problems stabilizing flight from 0 yards to 50 yards.
Making The Adjustments:
#3 Aligning broadhead blades with the arrow fletching. There are several companies that make aluminum, steel, nylon and rubber washers or spacers that will allow you to align the fletching with a good three blade broadhead. These will also aid in setting your (F.O.C.) correctly by fine tuning your weight. (Try Here).
When looking down the arrow shaft from the nock end your three blade broadhead and fletching should look like the below diagram.
#4 The wobble test as it is known through out the world of archery is spinning the arrow in v-blocks to see if the broadhead is in true alignment with the arrow shaft and then visually make a judgement by eye only, whether it is concentric or not, to the best of my machining knowledge the human eye can not discern the difference of a few thousandths of an inch in measuring what is known as run-out.
It is my belief that this is where most accuracy issues arise with bowhunters in tuning their broadheads.
The tool to the left is the RCBS Case Master gauging tool used in ammunition reloading, it is a very useful tool for tuning arrows as well.
By placing the arrow in the v-blocks you simply lower the run-out gauge down to make contact with broadhead ferrule where it is attached to the arrow, spin the arrow and observe the run out gauge for the run-out and make adjustments accordingly by loosening and retightening the broadhead until it is in perfect alignment with the arrow shaft.
Next for the centrifugal force test you will need a battery powered variable speed drill of good quality a v-notch cut in a board and a good steady hand.
However you can pretty well eliminate the old problem of trying to get your broaheads to impact the target in the same spot as your field tips just by selecting the same weight for each and the same length for each.
The reason for selecting same weight and same length is quite simple the oscillation in your arrow that you can not see is duplicated exactly the same for both field tip and broadhead.
The balance of an arrow can be modified by adding weight or reducing weight to the front of the arrow as needed.
In order for an arrow to fly correctly, the center of mass or (balance point) must be located somewhere between the tip and the middle of the arrow of its entire assembled length in other words its entire length from the tip of the broadhead to the end of the nock or center of its total (Over All Length).
If the center of mass or (balance point) is located close to the tip, the arrow will have good stability but will drop quicker and have less penetration because of the heavy nose.
If the center of mass or (balance point) is located close to the center of the shaft, the arrow will have good range and good penetraton, but arrow flight may be unstable.
Common F.O.C. for hunting and field archery is 10% - 15%. While this may not be an exact science to selecting a correct broadhead for hunting, there is a very exacting science to this and I will explain. It is all about the yardage, energy retention and flat trajectory!
How To Calculate The F.O.C. Of An Arrow:
1st Measure the full length of your arrow from tip to nock and if you have been paying attention to all the above details in bold print your field points and broadheads will be the exact same length, write this number down. Divide this measurement by 2, this is the exact center of your arrow. Make a mark on your arrow.
(Example) 21 3/16" convert fraction to decimal divide the 16 into the 3 = .187 so the overall length is 21.187" now divide this by 2 = 10.593" place a small mark on your arrow at this measurement with a marker.
2nd Now balance your arrow on a pencil or whatever you have and measure from your balance point back to your mark that is center of your arrow. Now take this number and multiply by 100. Write this number down.
(Example) 2" x 100 = 200
3rd Now take your second number and divide by your arrows total over all length number = % F.O.C.
(Example) 200 divided by 21.187 = 9.439% F.O.C.
Making Good Use Of F.O.C. Calculations:
In the above example you will see the F.O.C is out of the normal range for hunting, the balance weight is more toward the center of the arrow.
Now is this a bad thing? If you have accuracy at the normal hunting range that is well within your capability the answer is no, why, because that arrow will fly a flatter trajectory than the same arrow with a higher F.O.C., so how do you increase the F.O.C., if the arrow does not have good accuracy, you simply use a heavier broadhead to increase it. Why? As you bring the nose of the arrow down you will increase the accuracy, why, more air is forced onto the fletching which is the steering on the arrow, but you will start loosing your flat trajectory, why, because you are adding weight to the arrow thus a loss of velocity and your increasing drag by passing more air onto the fletching which decreases velocity as well.
A Bad Current Trend In Bowhunting Concerning Broadheads:
It seems to me that in the world of bowhunting as of late, everyone is shooting large cut diameter expandable broadheads "bigger holes kill quicker", true, as long as that arrow exits the animal and leaves a blood trail so you can find it.
A 7/8" - 1" hole through the vitals of any animal alive on this planet will succumb to hemorrhaging as this is how an arrow kills effectively.
By using a smaller diameter cutting broadhead at lower velocities or higher velocities with lighter arrows you are pretty much guaranteed a pass through shot and have a good blood trail to follow to find your quarry.
By all means use as large a cutting diameter broadhead that your fletching will allow you as long as you know you will have a pass through shot on your quarry so you may find it.
If You Have Not Gained Accuracy Yet:
These next three pages will certainly identify your crossbow accuracy problem, Broadhead Accuracy, Maintenance & Tuning and Accurate Scope Mounting.
Copyright 2001 - 2010.
Crossbow Broadheads, Tuning For Superior Accuracy:
If you're using fixed blade broadheads out of a crossbow, tuning the broadhead is critical and while it may seem frustrating to do this, the rewards of doing so will be less time wasted looking for bad hit animals and more meat in the freezer.
A shorter crossbow arrow has less ability to stabilize in flight than a longer arrow.
Most crossbowmen will use mechanical heads as a shortcut instead of tuning their arrows. This is not an acceptable short cut to trying a number of fixed blade broadheads to see which ones fly the best.
Simply put mechanical heads waste 25 to 50 percent of an arrow's penetrating energy just to open up and crossbow arrows are light thus giving up much needed energy to effectively open a mechanical broadhead. The butterfly action of these heads plus their long noses combine to create high penetrating friction.
The other detracting factor to mechanical broadheads is, the blades are not supported at the rear when open and they can easily fold or snap on impact with bone or even heavy ribs.
Our Extensive Crossbow Arrow Testing Made Light Of These Facts:
1. Anything less than 5" fletching length, on short crossbow arrows 15"-22" length, the arrows will not satisfactorily stabilize in flight, for excellent short and long range distance accuracy "period".
2. Penetration and accuracies went hand in hand by arrow length with well made three bladed broadheads as follows;
15"-18" arrows 7/8"-1" cutting diameter
18"-20" arrows 1"-1 1/16" cutting diameter
20"-22" arrows 1 1/16"-1 1/8" cutting diameter.
3. Alignment of the fletching and the blades resulted in an increase that was very measurable of accuracy at longer ranges or more distant targets.
4. Centrifugal force and run-out alignment test of arrows with broadheads and field points resulted in higher yields of pinpoint accuracy than the usual wobble test.
5. Front Of Center (ie; f.o.c.) arrow weight distribution for short crossbow arrows heavily favors 12.5% for superior accuracy and penetraion, at just 8% or 16% accuracy and flat trajectory flight falls off to the point it is noticable on distant targets including loss of penetration.
6. Of all the crossbow arrows and crossbow arrow manufacturers we tested, the new Beman ICS Carbon LightningBolt with ViBrake inserts required very little adjustment using quality 100 grain field points and quality 100 grain broadheads turning in excellent results with many different velocity crossbows.
7. Of all the broadheads and broadhead manufacturers in penetration tests and accuracy tests, the Trophy Ridge Ultimate Steel Broadheads performed almost to perfection.
8. By using quality; crossbow arrows and components thereof, we achieved extreme accuracy and tested up to a velocity of 340 feet per second with little effort and only minor problems stabilizing flight from 0 yards to 50 yards.
Making The Adjustments:
#3 Aligning broadhead blades with the arrow fletching. There are several companies that make aluminum, steel, nylon and rubber washers or spacers that will allow you to align the fletching with a good three blade broadhead. These will also aid in setting your (F.O.C.) correctly by fine tuning your weight. (Try Here).
When looking down the arrow shaft from the nock end your three blade broadhead and fletching should look like the below diagram.
#4 The wobble test as it is known through out the world of archery is spinning the arrow in v-blocks to see if the broadhead is in true alignment with the arrow shaft and then visually make a judgement by eye only, whether it is concentric or not, to the best of my machining knowledge the human eye can not discern the difference of a few thousandths of an inch in measuring what is known as run-out.
It is my belief that this is where most accuracy issues arise with bowhunters in tuning their broadheads.The tool to the left is the RCBS Case Master gauging tool used in ammunition reloading, it is a very useful tool for tuning arrows as well.
By placing the arrow in the v-blocks you simply lower the run-out gauge down to make contact with broadhead ferrule where it is attached to the arrow, spin the arrow and observe the run out gauge for the run-out and make adjustments accordingly by loosening and retightening the broadhead until it is in perfect alignment with the arrow shaft.
Next for the centrifugal force test you will need a battery powered variable speed drill of good quality a v-notch cut in a board and a good steady hand.
- 1st Along the arrow shaft find the balancing point and mark it with a marker of some kind DO NOT use tape.
- 2nd Chuck the nock end of the arrow into the drill, you can put a piece of tape here so as not to mark up your arrow and don't crush the nock either.
- 3rd Lay the arrow down into the notch of the board and slowly accelerate the drill until it is running at full speed, as you accelerate the drill if you notice the arrow start bouncing hard "stop the drill" and remove the arrow because it just failed the centrifugal force test, there is most likely something inside the arrow that you can not see that has it out of balance or it is bent.
However you can pretty well eliminate the old problem of trying to get your broaheads to impact the target in the same spot as your field tips just by selecting the same weight for each and the same length for each.
The reason for selecting same weight and same length is quite simple the oscillation in your arrow that you can not see is duplicated exactly the same for both field tip and broadhead.
The balance of an arrow can be modified by adding weight or reducing weight to the front of the arrow as needed.
In order for an arrow to fly correctly, the center of mass or (balance point) must be located somewhere between the tip and the middle of the arrow of its entire assembled length in other words its entire length from the tip of the broadhead to the end of the nock or center of its total (Over All Length).
If the center of mass or (balance point) is located close to the tip, the arrow will have good stability but will drop quicker and have less penetration because of the heavy nose.
If the center of mass or (balance point) is located close to the center of the shaft, the arrow will have good range and good penetraton, but arrow flight may be unstable.
Common F.O.C. for hunting and field archery is 10% - 15%. While this may not be an exact science to selecting a correct broadhead for hunting, there is a very exacting science to this and I will explain. It is all about the yardage, energy retention and flat trajectory!
How To Calculate The F.O.C. Of An Arrow:
1st Measure the full length of your arrow from tip to nock and if you have been paying attention to all the above details in bold print your field points and broadheads will be the exact same length, write this number down. Divide this measurement by 2, this is the exact center of your arrow. Make a mark on your arrow.
(Example) 21 3/16" convert fraction to decimal divide the 16 into the 3 = .187 so the overall length is 21.187" now divide this by 2 = 10.593" place a small mark on your arrow at this measurement with a marker.
2nd Now balance your arrow on a pencil or whatever you have and measure from your balance point back to your mark that is center of your arrow. Now take this number and multiply by 100. Write this number down.
(Example) 2" x 100 = 200
3rd Now take your second number and divide by your arrows total over all length number = % F.O.C.
(Example) 200 divided by 21.187 = 9.439% F.O.C.
Making Good Use Of F.O.C. Calculations:
In the above example you will see the F.O.C is out of the normal range for hunting, the balance weight is more toward the center of the arrow.
Now is this a bad thing? If you have accuracy at the normal hunting range that is well within your capability the answer is no, why, because that arrow will fly a flatter trajectory than the same arrow with a higher F.O.C., so how do you increase the F.O.C., if the arrow does not have good accuracy, you simply use a heavier broadhead to increase it. Why? As you bring the nose of the arrow down you will increase the accuracy, why, more air is forced onto the fletching which is the steering on the arrow, but you will start loosing your flat trajectory, why, because you are adding weight to the arrow thus a loss of velocity and your increasing drag by passing more air onto the fletching which decreases velocity as well.
A Bad Current Trend In Bowhunting Concerning Broadheads:
It seems to me that in the world of bowhunting as of late, everyone is shooting large cut diameter expandable broadheads "bigger holes kill quicker", true, as long as that arrow exits the animal and leaves a blood trail so you can find it.
A 7/8" - 1" hole through the vitals of any animal alive on this planet will succumb to hemorrhaging as this is how an arrow kills effectively.
By using a smaller diameter cutting broadhead at lower velocities or higher velocities with lighter arrows you are pretty much guaranteed a pass through shot and have a good blood trail to follow to find your quarry.
By all means use as large a cutting diameter broadhead that your fletching will allow you as long as you know you will have a pass through shot on your quarry so you may find it.
If You Have Not Gained Accuracy Yet:
These next three pages will certainly identify your crossbow accuracy problem, Broadhead Accuracy, Maintenance & Tuning and Accurate Scope Mounting.
Copyright 2001 - 2010.
Cliff
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
Barnett Ghost 400
22" custom Easton aluminum Xx75 Magnum 2219 arrows
Scope: UTG 30mm SWAT 3-12X44 Compact IE Scope with AO Mil-dot, 36 Colors EZ-TAP with Big Wheel parallax adjustment
HHA Speed Dial
Vertical Aluminum Grip
Broadhead: 100 grain Grim Reapers
