Thread: 7.7x58 jap ammo
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Old November 3, 2012, 02:12 AM   #9
tahunua001
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Join Date: July 21, 2011
Location: Idaho
Posts: 6,095
they are not NIB.
hornady has their own head stamp. also if I understand you correctly you only purchased the brass and the boxes state a bullet weight, only found in preloaded ammo. what you bought was somebodies used brass which they reboxed and sold to to your local gun store. I will agree with the assessment that one was mistakenly fired from a 30-06 and the casing fire formed out to the chamber dimensions while the other appears to have been fired from the proper chamber.

EDIT: I just re-read the original post. you say that the PPU/PRVI blows back?

stop firing at once and take it to a gun smith to verify chamber.
I will almost bet that your rifle was bored out to 30-06.
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