Originally Posted By: msincI have shimmed many scopes, most for optical zero....I always just purchased the ready made shims from Brownell's, not that there is a problem with shims cut from a beer can, I have also had to use them. I have yet to see a scope shim "fail." Would someone please explain exactly how a one piece thin metal shim with no moving parts, properly installed {there's some real rocket science} and locked in place under a scope base "fails"???? Exploded, threw a rod, rusted away to nothing, warped from heat, what?????
They are typically not as precisely constructed as a good base. There is always the potential for something to shift, say if the optics take a hit. Not that I believe this to be a likely scenario and I never had it happen with the one gun I (still) have set up with shims.