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Old March 14, 2006, 02:04 PM   #8
Art Eatman
Staff in Memoriam
 
Join Date: November 13, 1998
Location: Terlingua, TX; Thomasville, GA
Posts: 24,798
The purpose of the shim is to make the vibrations of the barrel be uniform from shot to shot. Think of the shock aborbers on a car, which dampen the springs. (Which is why the Brits use the term "dampers".)

My uncle taught me this little trick when I was a kid. It works. And it's cheaper than a BOSS.

Keep in mind that it's not always necessary, but I've never seen it hurt anything, groupwise...

, Art
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