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Bolt Shims

Grimmy

Grimmy

Member
Joined
Feb 28, 2008
Messages
44
Location
Lancaster, Ohio
Me and another member of our gun club have a CZ Varmint MTR .22 cal.
He installed bolt shims in his and hopes it will improved the guns accuracy.

Are bolt shims really necessary in a MTR since it has a match grade action to begin with?
 
Depends on the rim thickness of the ammunition you are using, and the rifles original headspace.

A “correctly“ headspace gun might not need a shim for “average” ammunition rim thickness, be loosely headspaced for thin rims, and gall the shims with thick rimmed ammo.
 
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