Shims for Scope?

[jhlewis10]

Bought my first rifle, .223 with 22 bull barrel.   I put a $100 bushnell banner on it, 4x12.  I am using Weaver rings Xtra High to clear the hammer.  Only 2 screws on the top of of the rings.  I forget the model number.  

Went to the range, looked down the bore at 25yrds and sighted it up the best I could.  Fired some shots and they are all Right and Low.   I am bottoming out on the adjustments, so I figure I need to move the rings around and/or shim the scope.  

Any ideas or tips?  This is my first rifle, and the only scope I have used since my crossman bb gun days.

Thanks.

[quickdtoo]

If you use shims in the rear ring under the scope, you'll tweak the scope's tube, not a good idea. Shims need to go under the base, or an even better choice is to use Burris Signature Zee rings and their offset insert kit, costs more money, but you won't ruin the scope.

Tim

http://burrisoptics.com/sigrings.html

[harrygoat]

You might try centering your crosshairs to the middle of their adjustment range. It's a tedious job but it works.
Turn your knobs fully to the end of their travel, keeping both W and E roughly at the same rate, you don"t want one to get to far ahead of the other, try to keep count of  the number of clicks. Say the number of clicks is 80, go back 40 clicks on your W and E, now crosshairs are centered. Just sight in as usual.
I hope this takes care of your problem.

harrygoat

[cheatermk3]

If your shots are hitting low, and you're out of adjustment clicks, it means that you need to lower the scope, not raise it, so what good would shimming do?  Unless I'm not understanding your post?

[quickdtoo]

A much easier way to optically center the reticle is to use a mirror....from Leupold's Answer guide...

http://www.leupold.com/resources/MyInfo81/Answerbook/findanswers.aspx

Centering of a scope's adjustment dials
The elevation and windage adjustments of a scope are easily centered. Place a small mirror against the objective end of the scope. That would be the end farthest from your eye as you look through the scope. Make certain that the mirror is large enough to cover the entire objective. It must also be flat against the objective. With the scope's power selector ring set at the lowest magnification, look through the eyepiece as you would while aiming at a target. If the scope's windage and elevation adjustments are off center, you will see two images of the reticle (cross-hair). To reach the center of the adjustment range, simply turn the elevation and windage dials until you see only one image of the reticle.

Here's a thread on shimming, although it's for a 10-22, the base is a weaver style rail...If you can't raise the point of impact by adjusting the scope's elevation turret in the direction of the up arrow, you need to raise the rear of the rail or use different rings to accomplish the same without ruining the scope by improper shimming.

http://rimfirecentral.com/forums/showthread.php?t=122064&highlight=shimming

[jhlewis10]

Thanks for the help I will try all of these ideas before shimming to bring the rear up.  I think since the scope is so high to clear the hammer that this is causing the problem.

Jeff

A much easier way to optically center the reticle is to use a mirror....from Leupold's Answer guide...

http://www.leupold.com/resources/MyInfo81/Answerbook/findanswers.aspx

Centering of a scope's adjustment dials
The elevation and windage adjustments of a scope are easily centered. Place a small mirror against the objective end of the scope. That would be the end farthest from your eye as you look through the scope. Make certain that the mirror is large enough to cover the entire objective. It must also be flat against the objective. With the scope's power selector ring set at the lowest magnification, look through the eyepiece as you would while aiming at a target. If the scope's windage and elevation adjustments are off center, you will see two images of the reticle (cross-hair). To reach the center of the adjustment range, simply turn the elevation and windage dials until you see only one image of the reticle.

Here's a thread on shimming, although it's for a 10-22, the base is a weaver style rail...If you can't raise the point of impact by adjusting the scope's elevation turret in the direction of the up arrow, you need to raise the rear of the rail or use different rings to accomplish the same without ruining the scope by improper shimming.

http://rimfirecentral.com/forums/showthread.php?t=122064&highlight=shimming