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Old May 17, 2019, 04:55 PM   #42
Bart B.
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Join Date: February 15, 2009
Posts: 8,927
Quote:
Originally Posted by HiBC View Post
I'd think the answer might be influenced by the design and tolerances of the rifle...Maybe a 1903A3 with excessive firing pin protrusion could set a shoulder contact back slightly...
But generally I'd look at the force going to the path of least resistance,which,IMO would be the primer dent. I would think the greater surface area of the shoulder would be more resistant than the small area of a firing pin strike.
My tests with a Win 70's 26 pound striker spring pushing its near 3 ounce firing pin 9 fps into primed 308 cases set their shoulders back .003" to .007". Pin protusion normal at .060".

Last edited by Bart B.; May 17, 2019 at 05:08 PM.
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