2aHawaii

General Topics => General Discussion => Topic started by: oldfart on October 18, 2024, 08:00:25 AM

Title: Deformed brass?
Post by: oldfart 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)

Title: Re: Deformed brass?
Post by: randay on October 18, 2024, 10:07:42 AM

wrong chamber

Title: Re: Deformed brass?
Post by: astroboy 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.       

Title: Re: Deformed brass?
Post by: nalo_b on October 18, 2024, 02:29:20 PM

Headspace?

Title: Re: Deformed brass?
Post by: powder monkey 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.

Title: Re: Deformed brass?
Post by: oldfart on October 21, 2024, 08:25:20 AM

My theory is that the chamber was incorrectly machined.