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Deformed brass? (Read 975 times)

oldfart

Deformed brass?
« on: October 18, 2024, 08:00:25 AM »
What might cause this unusual shape?
7.62x39 factory ammo.
It's not mine. I just found it.
(I have my theory but want to hear other opinions)
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What, Me Worry?

randay

Re: Deformed brass?
« Reply #1 on: October 18, 2024, 10:07:42 AM »
wrong chamber
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astroboy

Re: Deformed brass?
« Reply #2 on: October 18, 2024, 12:58:08 PM »
The affected rifle was built by a supposedly well known mainland gun smith.
The owner of the rifle was told by several very experienced people he has a serious problem.
The owner appeared to not fully understand nor appreciate the concern of others. .
If any of you know the owner of the rifle, please tell him to contact the gunsmith.
 He should at least text him a pic of a fired case asap.       
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nalo_b

Re: Deformed brass?
« Reply #3 on: October 18, 2024, 02:29:20 PM »
Headspace?
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powder monkey

Re: Deformed brass?
« Reply #4 on: October 18, 2024, 02:51:08 PM »
Improper cut chamber.
Barrel manufacters use boring bar to cut chamber for mass produced barrels.
1 that fell thru the cracks. Smith most likely test fired but did not inspect fired case.
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oldfart

Re: Deformed brass?
« Reply #5 on: October 21, 2024, 08:25:20 AM »
My theory is that the chamber was incorrectly machined.
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