Starting a thread about AK ammo discussion. I'm thinking 7.62x39, but 5.45x39 as well.
Figured this discussion could use it's own thread. That and didn't want Stang's AR build thread to go too far sideways.
Anyways, the AK ammo that I currently have:
WPA Polyformance 123 gr HP
Norinco China Sports Soft Point and Lead Core (FMJ)
All are steel cased, berdan primed and boxes indicate non-corrosive. In another thread, the discussion was berdan primers can be corrosive. From what I've read (not that much) so far is that berdan primers can be corrosive, but many say that recent production ammo is fine.
I have about 200+ rounds through my Arsenal AK with a mixture of WPA Polyformance and Silver Bear. All steel cased and berdan primed. I just took a quick look and no rust on chamber, muzzle device, piston rod, etc. I did clean the gun after each shooting session. Minimum was a boresnake. I'm not saying that says to me that my ammo is fine, but just seems fine so far. I also read that some AKs seem to be more susceptible to rusting as well.
I've also read that many believe early 70's and older ammo is likely corrosive. Not sure how old the Norinco ammo that I have is since I picked it up with an AK that was in an estate sale. From my research so far, it seems like the ammo is early to mid 80s production, but not sure either way. I have about 400 rounds of a mix of lead core and soft points. I was really looking forward to testing the soft point ammo out on sections of 4x4 and see difference between that and the lead core. The owner of the gun had the ammo "preset" in an alternating pattern of soft point and lead core.