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Old October 14, 2008, 08:07 AM   #15
Harry Bonar
Senior Member
 
Join Date: December 5, 2004
Location: In the Vincent, Ohio general area.
Posts: 1,804
shim

Sir;
If, I say, IF, you're going to "shim" up a scope a very small amount, you can put some cut brass stock under the scope at BOTH bases - not just one.
Some bases and rings are far enough off to start with. Scope, or, iron sight mounting is done so that the sights are paralel to the bore line (the bases) so that the optical center of the scope is also there, then you can adjust the scope internally.
A good test is to remove the bolt - look through the bore and raise your eyes up and see if the "exit pupil" is centered in the middle of the eyepiece!.
Mausers with Wever bases and rings are particularly prone to misalignment, but I still do not shim them. Everything must be "kosher" and aligned in scope mounting. Redfield one piece bases are very good because the alignment can be adjusted at the read. Even as close as Redfield on piece bases are you will still see the rear sometimes need to be pulled down as you tighten that screw! Scopes cannot be mounted, "on a bind."
Harry B.
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