Originally Posted by Tape
are you talking about shimming the mount?
I use aluminum foil to shim up scopes all the time. Works great IMO.
If its shooting to high, take the top scope mount cap off, and slide a folded up piece of foil under the front of the scope between the underside of the scope and the mount.
Opposite if shooting to low,, slide a piece under the rear of the scope.
I do try and make the foil about the same size as the ring for width. But you cant have it too long as the scope wont sit down in the ring. about 3 or 4 layered fold usually does the trick. Good luck.