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brass issues

  1. J

    Is my lower causing my brass to look like this?

    I have a 20" woa spr build with an aero precision upper jp fmos bolt. Giessele rail. Oss 7.62 hq qd suppressor. 5d tactical 80% lower and a giessele lpk. I've built my upper twice with 2 different upper receivers. Both aero uppers. And my brass still looks like this with standard milspec...
  2. J

    Extractor marks normal?

    This is a 5.56 factory load: frontier 75gr bthp. Does this mark on the brass casing mean that it's having pressure issues? The mark on the right case isn't as bad. I planned on starting to reload for this rifle but if its having weird pressure issues with factory ammo I'll get a new barrel. I...
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