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Discussion Starter · #1 ·
I took my new 400 TD Assassin out today to work sighting it in and noticed after about 50 shots I started to get a consistent shift from aim to impact. Has anyone else seen this on a new bow? I assume I am just seeing the bow settle in but want to make sure in my assumptions. Thanks for the help on this. FYI I have looked the bow over nothing is loose and no scope issues I can see as the shift has now remained consistent from first shooting it
 

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Better start checking everything cause bows don't do that....atleast mine didn't. Make sure every bolt on the bow is tightened from the first one to the last one. After checking everything try sighting in using just one arrow. IF that doesn't stay consistant come back and tell us what it's doing.
 

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Discussion Starter · #4 ·
Wheels Yes I had the micro suppressor 1st I can tell there is a tad more vibration after the shot but she holds well on shooting sticks and I find shooting it a bit more comfortable due to all the adjustments. I do need to spend more time with it and play with the arrows as all 3 vanes have same colors and I need to mark a cock feather. I’ll keep you posted but I like the bow so far.
 

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I took my new 400 TD Assassin out today to work sighting it in and noticed after about 50 shots I started to get a consistent shift from aim to impact. Has anyone else seen this on a new bow? I assume I am just seeing the bow settle in but want to make sure in my assumptions. Thanks for the help on this. FYI I have looked the bow over nothing is loose and no scope issues I can see as the shift has now remained consistent from first shooting it
How has your brace height been? Are you lubing your rail or running it dry? You might be just working the wax out of the string. Or wearing the lube off the rails.
Both of my Excaliburs always shoot a little different with lube on the rails than as it wears off but only talking about fraction of an inch at 30 yds. I lube for target shooting and leave it dry as the season gets underway.
I agree that a full check of your bolts is in order, especially under the stock.
 

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Two things. How much is your shift of POI and have you had someone else shoot it to exclude you from the possibles?
 

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On my Excalibur there 6 screws/bolts that in addition to the scope ring mounting screws/bolts that must be tight. The 4 that mount the scope rail to the trigger housing and the 2 under the stock that mount the trigger housing. The last 2 are different length but ALL 6 must be checked/torqued.
 
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Discussion Starter · #10 ·
Perfect thanks I’ll check the screws and see what I find. So the shift started after 30 shots. The shift went to the 2 o’clock position 4” off from center and remains consistent after the shift and the bow grouped all arrows tightly at 40 yards.
 

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Discussion Starter · #11 ·
I just reflected all my arrows with 3.15 vanes from the blazer that where originally on it with a 1 degree offset and added a cocked color vane. I’ll see how they fly tomorrow and see if I got the spine indexed with such a short arrow I found it hard to tell.
 

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I took my new 400 TD Assassin out today to work sighting it in and noticed after about 50 shots I started to get a consistent shift from aim to impact. Has anyone else seen this on a new bow? I assume I am just seeing the bow settle in but want to make sure in my assumptions. Thanks for the help on this. FYI I have looked the bow over nothing is loose and no scope issues I can see as the shift has now remained consistent from first shooting it
Check all the screws in scope rail and scope mount 4 screws on sides of rail 2 on each side
 

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Discussion Starter · #14 ·
I am glad to report the issue I was having was due to the arrow fletching and nothing more. I looked the bow over no loose bolts this thing has so much vibration after the shot they would buzz and hum if I had. I ended up removing the helical blazer vanes off and using a vane tec 3.15” with 1.5 degree offset and they fly well picked up some arrow speed too. The shot at 40 yards was at a 1” tape square close enough for me. Not sure what the speed ring is telling me but my guess is 390FPS with a 400 grain arrow love the bow tad bit loud.
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Iv got micro axe 340 no vibration their the veins on these 16,5 bolts are small and straight no twist but out of the box it zero real quick then after about 10 more shots was going left or right several inches but my scope rail vibrated loose Well i hate to hear about your vibration ishue but thats why i dont like fast bows lol 340 plenty fast
 

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Discussion Starter · #16 ·
Iv got micro axe 340 no vibration their the veins on these 16,5 bolts are small and straight no twist but out of the box it zero real quick then after about 10 more shots was going left or right several inches but my scope rail vibrated loose Well i hate to hear about your vibration ishue but thats why i dont like fast bows lol 340 plenty fast
Jspear there is a 55lbs limb difference between our bows I am sure that is my issue on the vibration but if all things hold tight just makes hard to see the shot is all .
 

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I took my new 400 TD Assassin out today to work sighting it in and noticed after about 50 shots I started to get a consistent shift from aim to impact. Has anyone else seen this on a new bow? I assume I am just seeing the bow settle in but want to make sure in my assumptions. Thanks for the help on this. FYI I have looked the bow over nothing is loose and no scope issues I can see as the shift has now remained consistent from first shooting it
After 50 shots the bows change a little everytime I shoot. Then when I go out next day it's fine.
 

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Kriss I suspect after 50 shots your arms are getting tired and your cocking the bow a little off. It can happen even using a rope cocker. If your using a crank cocker then I guess it is something else.
 
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A string that is often responsible for a horizontal shift when it is settling.
 

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Most times this is caused because the condition you are shooting in has changed!

Usually "WIND" wind speed, wind direction, and don't think just left to right or right to left can effect your poi. Change from headwind to tailwind can change your poi vertically, as can be so in left or right wind, throw in helical fetching and throw in more affect from wind from different directions.

Wind affects high powered rifles, and I have watched folks change their zero every time they shoot in a different wind because they don't know how to account for it. Archery compounds this to a large degree, pay attention to wind and realize at 30 or 40 yards if 10 mph wind can move your poi 3/4 of an inch and you zero for that condition reverse it and you can now be 1 1/2" the other way. Accept it and zero on a calm day,,,, which I always do,,,,,, and you will only be off 3/4" from poa regardless which way it is coming.

Best thing to do is learn how to read the conditions you shoot in, use some indicators of some sort, and allow for it, in time you'll learn to account for it without artificial detectors and become a marksman.
 
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