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Old March 13, 2013, 07:14 PM   #13
Bart B.
Senior Member
Join Date: February 15, 2009
Posts: 6,318
Math Teacher, did you measure those new cases' OAL before firing them?

If it's a rimless case, they'll sometimes get longer; their head's held against the back end of the chamber and their shoulder gets blown forward.

Same for new belted magnum cases; my 30 caliber ones sometimes did get a bit longer when fired.
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