Bolt pitting on SAM-7
This happened many years ago and I'm wondering what you guys think.
I've got an SAM-7 I've had since they first released them. I've shot about 2000 rounds through it, but the bolt started pitting around the primer area within the first 100 rounds using wolf non-cor ammo. I didn't think it was normal and sent the bolt to Arsenal who sent it back saying it's normal. I could tell that they had hardness tested it due to the marks on the bolt. Regardless, I still thought it was a problem so I bought a new Bulgarian bolt ––are they really Bulgarian?–– from K-var. Within 100 rounds, that bolt started pitting as well. Eventually I found a very cheap E. German bolt, decided to give that one a try, which headspaced perfect btw. I've shot many rounds through that bolt and it has no indication of pitting and I'm confident it will not pit.
These are the bolts in question. I sold them through this forum a long time ago at a discount. Normal or not normal?
Oh now I remember, I WAS firing corrosive ammo, this really old stuff that someone at my gunsmithing school sold to me. He said it was non-cor but it clearly was not. Mystery solved.
I had a SAS-M7 A1, manufactured in late Sept. 2004, that started getting the same pitting after a couple hundred rounds.
Only shot Wolf, Silver Bear, etc... modern 7.62x39.
Pretty disappointed as I shot the same ammo out of an SAR-1 from 2000, and the bolt face was much better looking.