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Old December 29, 2019, 01:51 AM   #187
stagpanther
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Join Date: March 2, 2014
Posts: 6,884
I never get those rings in my fired brass--plus I did a chamber cast that doesn't show any deviation from SAAMI specs, more or less impossible for the case mouth to get forced past the step-down without a bullet-deforming crimp, but yet I get the same expansion in the head in my failed case as you have in your "belted" case. You might consider doing a cast and see if it's like the one Flados shows to see if your chamber has the same issue.
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