I have lots of all kinds of ammo in 7.62x39. I am not very happy about the red box Norinco (never paid more than $10/20), they fly all over the place. The Chinese surplus which is readily available is much more accurate. Yes, it is corrosive but this only means that the primers are, just clean the frickin thing when you go home. It is not gonna eat your rifle. In fact, I am so lazy, I usually clean the next day. Separate the receiver from the stock and use whatever I feel to clean the receiver, barrel/bolt assembly and gas tube, followed by a rinse with hot water. Never had rust. The best ammo is Barnaul which I have plenty but the accuracy of the Chinese is very similar.