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Help diagnose markings on spent cases and build of the week
#8
Thanks all. I've been using AA mags, and no scratches are left on brass fired from my grendel pistol, so I don't think that's the issue. I'm going to assume at least some of the issue is over gassing; will try a heavier buffer or adjustable gas block and report back if I learn anything.
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Help diagnose markings on spent cases and build of the week - by Dcommoncents - 01-09-2019, 05:18 PM

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