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Bolt pitting on SAM-7
10/30/2010 10:32:56 AM
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.
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.
10/30/2010 7:26:26 PM
These are the bolts in question. I sold them through this forum a long time ago at a discount. Normal or not normal?
10/30/2010 10:56:28 PM
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.
11/16/2010 10:13:45 PM
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.
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.
