I have a Romanian AK (7.62x39) that I purchased from Century arms. It was a cheapy and probably a parts gun so I knew I was going to have to fine tune it. Anyway, it functions fine with Wolf ammo and all other 7.62x39 ammo EXCEPT the damn copper washed Chinese ammo that I have a ton of. It fails to extract the fired case and then strips a fresh round off of the magazine and tries to feed it into the chamber. I have changed out the extractor spring but that made no difference. I have ordered a new extractor and will try that. Anyone have a similar experience?