hawkeye10
Member
I need to put a shim under my scope on the rear ring of about .035. Should I cut the shim length to come up the sides or stay more toward the bottom? Don
Shimming a scope question?
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Art Eatman
Moderator In Memoriam
I've shimmed under scope bases a couple of times and it worked just fine, but never under a scope in the rings. That would easily result in distortion of the tube.
rcmodel
Member in memoriam
+1
Do Not put a shim inside the ring.
The clamp pressure can destroy the scope by distorting or bending the tube.
If you must shim, shim under the base.
rc
Do Not put a shim inside the ring.
The clamp pressure can destroy the scope by distorting or bending the tube.
If you must shim, shim under the base.
rc
dmazur
Member
I recently solved a scope alignment problem by lapping. Lots of lapping.
It was for a Ruger No. 1, and Burris Signature rings weren't available.
I solved the windage component with windage-adjustable rings, but the elevation component would have required a 0.025" shim under the rear mount.
Rather than mess with the Ruger integral mount system, I chose to lap the front ring lower. 0.025" was enough that I had to take a little off the lower ring half "ears" to maintain a gap for clamping.
This maintained a "cylinder" clamp arrangement for the scope, so it didn't bend it.
IMO, any shimming, whether it is between the mount and the ring or the ring and the scope, has the potential to bend the scope tube...
It was for a Ruger No. 1, and Burris Signature rings weren't available.
I solved the windage component with windage-adjustable rings, but the elevation component would have required a 0.025" shim under the rear mount.
Rather than mess with the Ruger integral mount system, I chose to lap the front ring lower. 0.025" was enough that I had to take a little off the lower ring half "ears" to maintain a gap for clamping.
This maintained a "cylinder" clamp arrangement for the scope, so it didn't bend it.
IMO, any shimming, whether it is between the mount and the ring or the ring and the scope, has the potential to bend the scope tube...
WYOMan
Member
Personally I prefer the Burris Signature rings with offset inserts for that kind of situation.
Strongbad
Member
The Burris Signature rings can be good and bad. In cold weather they can contract and get slippery. When I had a rifle accurized by Hill Country Rifles a few years back, they removed them from the gun and replaced them with a standard set of Leupolds. I know that the ideal way to do it, if you have to is to shim the base. However I have to admit that I've shimmed inside the rings under the scope more than a few times over the years and it worked perfectly in each instance, no kinking of the scope tube, nada.
Old Dog Man
Member
Shimming Scope
I have seen some bases that needed shimming on older military actions, but not on commmercial ones. As said above do not shim inside rings, it will change the round hole into an egg shape. And I've used the Burris Signature rings with inserts in Canada at -30 degrees and Alaska and never had a problem with them, they work. Al
I have seen some bases that needed shimming on older military actions, but not on commmercial ones. As said above do not shim inside rings, it will change the round hole into an egg shape. And I've used the Burris Signature rings with inserts in Canada at -30 degrees and Alaska and never had a problem with them, they work. Al
Shimming under a base, is still putting stress on the scope. What issue are you having that you need a .035" shim? Taking your scope base alingment out of the same plane, is a bad idea, unless you need .035" to get it back into the same plane
gamestalker
member
+1 on JD Gray's point. The only time I ever had to lap a ring at all was when I dropped one and dinged it on the egde of bearing surface.
I've hunted in sub zero weather with wind chills of 60-70 degrees below zero, and never had a scope slip the rings. Properly torqed rings will not slip under any circumstances.
I've hunted in sub zero weather with wind chills of 60-70 degrees below zero, and never had a scope slip the rings. Properly torqed rings will not slip under any circumstances.
hawkeye10
Member
I took everyone's advice and bought a riser and some Burris off set inserts for my rifle. I already have two sets of BSZ rings. Don
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