Sks rusted after shooting Norinco non corosive ammunition. Anyone experience this?

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Military Surplus Lover

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Hi everyone. I went out to the range about 2 weeks ago now and brought the Sks and shot some of the new production norinco ammo that Canada ammo had not long ago. I intended to shoot it the next time I would go to the range so I decided not to clean it as I had only shot 40 rounds and the ammo was supposedly non corosive. Took it out of the safe today and the barell and bolt is full of rust. Luckily it's just a thin layer and I'm hoping ittl all come off. I've shot thousands of rounds of non corosive ammo through it and have never had this problem. Has it happened to anyone else here? Your input is much appreciated. Thanks
Update= Gas piston is all seized up. Everything else seemed to clean up
 
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did you buy it directly from Can Am, or from a secondary source. Head stamp from said ammo would be useful along with proof items to include with said photos. Anyway if true which I personally doubt it would be a serious issue.
 
I do not trust any CommBloc or Chinese stamped surplus or non- surplus ammo, even if they say non-corrosive right on the box.

If it’s not brass cased and made in the USA, it’s corrosive as far as I’m concerned! And I scrub my guns accordingly.
 
Izzit said:
did you buy it directly from Can Am, or from a secondary source. Head stamp from said ammo would be useful along with proof items to include with said photos. Anyway if true which I personally doubt it would be a serious issue.
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I did not buy it directly from Canada Ammo. I bought it from Tenda. I assume that they got it from Canada ammo though. I've had many dealings with both Canada ammo and Tenda with no problems thus yet. The round is all copper colour says 7.62x39. 311 which I believe to be factory code and 91 which I believe to be production year. Pics to come.
 
I have seemingly the same stuff purchased directly from Canadammo. The only difference is the headstamp is considerably more legible I hope I didn't buy a "lot" of corrosive.

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Based on headstamp type orientation that would be 2016 production and not 1991 production. Again any headstamp guru's want to roast me I am ready :)
 
Izzit said:
Based on headstamp type orientation that would be 2016 production and not 1991 production. Again any headstamp guru's want to roast me I am ready :)
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Do you know if that would indicate the earlier is corrosive and 2016 non-corrosive??
 
I bought a box of this stuff from canadaammo and have about half of it left. No corrosive issues yet but perhaps I will double check and ballistic right after to be safe. I will have to check my headatamps when I get home from the deer hunt.

I think if there is corrosive primers mixed in that is a manufacturing issue and misadvertising as noncorrosive. Still better safe than sorry I'm glad I didn't run into a surplus round that rusted my gear. I have definitely left rifles after shooting this assuming the advertising was correct. The other possibility that someone swapped out some surplus rounds which PRC surplus looks essentially the same as the Norinco noncorrosive except headstamp.. may e look thru a few boxes to see they match?
 
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