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Old December 31, 2012, 08:07 AM   #21
Bart B.
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Join Date: February 15, 2009
Posts: 4,986
Jimro, or measure case wall thickness and compare its thinnest part to where the case was oriented in the chamber when fired.

That can be done by using the primer's finger print from the firing pin tip as a reference. Slowly extracting a fired case from the chamber then marking it's top point with a marker will indicate where the top of the case was in the chamber when it fired.
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