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Perfectly normal. My blowback action AR 9mm leaves cases dirty to absolutely filthy with loads that leave cases clean to fairly clean in locked breech pistols.
That case looks a little too good to have come from a blowback design. It looks to me like it was fired in a locked breech design, and since I think the 84 is a blow back design, you are looking good.
Last edited by Walkalong; February 24, 2012 at 11:33 AM.
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