Mosin Nagant Question

mxwelch · April 26, 2007, 02:03 AM

My friend recently bought a M44 with a sealed can of brass surplus ammo. Don't have the headstamp because I'm at work but we had an issue that I've never experienced.

Two out of 10 rounds had small case splits near the rim. About 3/16" from the rim there were three cracks about 1/8" in length. I don't believe it's the headspace because it's too far up the round and I've never heard of a chamber being deformed. It looks in perfect condition. As of now I'm chalking it up to ammo. Any ideas?

DnPRK · April 26, 2007, 10:36 AM

Do the cracks run fore-aft or run circumferentially around the case?

Fore-aft cracks can be caused by stresses induced during the case drawing operation during manufacture and age hardening of brass.

Circumferential cracks are indicative of a headspace problem.

mxwelch · April 26, 2007, 02:31 PM

They're running fore-aft.

April 26, 2007, 02:03 AM	#1
mxwelch Senior Member Join Date: January 17, 2006 Posts: 379	Mosin Nagant Question My friend recently bought a M44 with a sealed can of brass surplus ammo. Don't have the headstamp because I'm at work but we had an issue that I've never experienced. Two out of 10 rounds had small case splits near the rim. About 3/16" from the rim there were three cracks about 1/8" in length. I don't believe it's the headspace because it's too far up the round and I've never heard of a chamber being deformed. It looks in perfect condition. As of now I'm chalking it up to ammo. Any ideas?

April 26, 2007, 10:36 AM	#2
DnPRK Senior Member Join Date: August 24, 2001 Location: LC, Ca Posts: 1,917	Do the cracks run fore-aft or run circumferentially around the case? Fore-aft cracks can be caused by stresses induced during the case drawing operation during manufacture and age hardening of brass. Circumferential cracks are indicative of a headspace problem.

April 26, 2007, 02:31 PM	#3
mxwelch Senior Member Join Date: January 17, 2006 Posts: 379	They're running fore-aft.