9 replies to this topic

[123GO]

just got my first parker cross bow. i am just trying to use a 1.5x deer scope on it and set at 20 yrds. the problem i am having is i have got to aim 6-8 inches high at 10yrds (all the room i got right now) to get it to hit bulls eye. the left to right is find and i can hit a dime size target at this distance if i aim high. my scope pegs out and i can't get it to go any further. is there any magic or tricks i can use to get this scope to work. if not i got to go back to the red dot that came with it that i don't really care for that much. hopefully someone can lead me in right direction. thanks, 123

[See4miles]

If your scope's adjustment is all played out in one direction, I must first ask this question, was it taken from another weapon so that it has been adjusted already when you put it on your crossbow?  If so, you need to reset the elevation back to the center of its adjustment.  An easy way to do this since you are at the opposite end it to click it all the way back to the other end, counting the clicks.  Then, bring it back to center by coming back half the number of clicks.  You have now re-centered the crosshairs within the given range of the scope.  Now try to sight in.  If you see that you are going to play it out again, you will have to shim the scope between the scope and the mounting rings.  I like to use aluminum foil strips.  Cut them so they are about a 1/4" wide and 3/4" long.  Remove the scope from the rings and lay in a single strip of foil in the bottom of the rear ring. It should lay in so you can't see it with the scope back in place.  Replace the scope, tighten it down and see what this gains you.  Then, do this until you have to adjust it back down,meaning you now hit high when aiming at zero and have adjustment in the scope to click it down to the bullseye instead of up.  This will give you some wiggle room.  Be patient doing all this and take your time. You may need two or three strips before you get it set.

[bucknbill]

i agree with the shims..put them in the bottom of rear ring

[Buzzard Bait]

I use brass shim stock .005 inch thick. You can also cut strips from a Pepsi or Coke can with a pair of sissors (I think they are about .002 or .003 inch thick). Like See4miles said, it make take as few as one strip or it may take several. Good luck.

[See4miles]

Brass shims are better for sure!  But I didn't think he happened to have them lying around.  I like the pop-can idea as well.

[pa crossbow]

I had the same problem with a scope years ago.Sent the scope back and again had the same problem with the new one.I called Parker this time and they said to use the shims but to put them between the stock and the end of the rail (safety end) one on each side. When I did that all was fine.So I guess that a shim either on the rear scope mount or between the stock and rear rail will do the trick.

[thake618]

use scotch tape works well if u put it on the bottom part of the rer ring were the scope seats just be careful how much u put because it will hit the sides and have a hard time seating properly

[CBRon]

First shoot the bow at 20yds. to see where you are. If it's still no good switch your rings, PUT FRONT RING ON BACK AND REAR RING ON FRONT. If still no good use shims, On a rifle .001 shim = about 1 inch at 100yds. You would need alot of shim to get 5 inches at 10 yards .. Try it in this order.....  Ron

[vaguru]

For most crossbows, 5" is equal to .030" between the bottom of the rear ring and the scope tube.  Depending on your particular bow, you could also put the shim under the rear of the scope mount, or under the rear trigger box mounting screw.  Any one of these should solve your problem.

I personally don't like to shim between the ring and scope (but I have done this, just today again as matter of fact), but would rather have the shim under the mount or trigger box.  Keeps stress off the scope tube by doing it the other methods.  JMO

[Cossack]

Burris makes rings with offset inserts made of hard composit that can be rotated in BOTH rings for the desired offset without stressing the scope
http://swfa.com/Burr...serts-C641.aspx