Case Failure---7.62X54R

telesquirt

telesquirt

CGN Regular
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Location
Fort Frances
Hi all---I was at the range several days ago and had gone thru about 15 rounds from my Mosin Nagant, when I had a problem opening the bolt.
I had to rap the bolt upwards several times before the round would eject.
I have tried to take some pics of the case---hope you all can see it ok.
Has anyone else had this problem with surplus ammo?---could there be a problem with the rifle?---Thanks and take care,

Rob.

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Split necks are common with milsurp ammo. I've seen them in most cartridges.

In my opinion, military ammo is a commodity that governments invest in. Buy enough to keep the plants running, to refresh the QM when training needs are met, and maybe to sell on the international market for hard currency or fulfil cooperation agreements. Not every lot meets the definition of 'great' ammo. So, those are the first lots sold off.
 
Sounds like there was a pre-existing crimp around the case shoulder, which is something you see sometimes with surplus ammo. Nothing to worry about IMO
 
I agree with Robsmith. I keep an eye out for splits or deformities on surplus ammo. I've caught several split necks on czech 7.62x39 before I loaded it. It's rare though, 1 per 2000 or so for me, so don't lose sleep if it doesn't repeat right away.
 
I have had that happen to me with older ammo/brass that has not been stored in good dry sealed conddition. The 8x62 brass was very brittle. But saying that excessive head spaving will do this as well. Good to check it out.

Pete
 
I don't know how out of spec headspace can cause that particularly on a rimmed case. A very generous chamber can contribute to it, but the root cause is old, brittle brass. "Fresh" ductile brass can be fireformed 50 thou or more without splitting like that.

Neck and shoulder splits pose no danger, they just ruin the brass (although it's still owrth keeping for its scrap value).
 
Andy said:
I don't know how out of spec headspace can cause that particularly on a rimmed case. A very generous chamber can contribute to it, but the root cause is old, brittle brass. "Fresh" ductile brass can be fireformed 50 thou or more without splitting like that.

Neck and shoulder splits pose no danger, they just ruin the brass (although it's still owrth keeping for its scrap value).
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I agree, old, brittle brass....
 
I had some old Dominion 30/30 Winchester that did the same thing...the whole darn box.

Still worked though, just not re loadable. :D
 
Yes, I had the same thing happen.

I stopped using milsurp. Up till then I had fired handloads and never had a problem. I pulled the rest of my milsup as it was not worth the risk as far as I was concerned
 
Not a big deal. I had it happen to me once in more then one thousand Czech surplus rounds. It wasn't hard to extract the round though.
 
Dsiwy said:
Never knew brass got brittle. Well now I know lol
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Most of the time when ammo is stored properly it will last along time and should look as new when opened. It's when the brass is exposed to moisture, sweet, etc. from being open/repacked/handled.
 
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