When I had my knees in the breeze and ass in the grass we had a saying. Never forget that your rifle and other equipment was made by the lowest bidder. Mil Spec is not the end all. Even Mil Spec shit breaks.
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When I had my knees in the breeze and ass in the grass we had a saying. Never forget that your rifle and other equipment was made by the lowest bidder. Mil Spec is not the end all. Even Mil Spec shit breaks.
Train 2 Win
Eastern bloc ammo usually will have a harder primer than American ammo. Maybe this is the cause?
I've ran russian ammo in my S&W MP for 3000rds+ never had an issue...still shot two inch groups at 100yrds...I doubt its that...but never say never
Last edited by thehun; 02-20-13 at 00:07.
I know that 7.62x39 made by Remington or Winchester isn't recommended for the sks because of slam-fires. That's due to the softer primers. That's how I came to my theory anyways.
I agree with Melon. Moral of the story: If you are concerned about reliability don't use a Smith and Wesson upper chambered in 5.45x39.
Well guys, it's been a long time since this has been updated. But ST mailed me the FP. And I have finally began testing in the lab. 1st things first, there is absolutely no indication of this being a welded two pc firing pin, none.
I have some more tests to perform on it before I'll be able to throw a rough pictorial report together so that all may understand.
I will say this much, there are some unusual inclusions within the base steel. I doubt they had anything to do with the failure at all, it's just interesting with this grade of steel to see such gross inclusions.
Tomorrow I'm going to check the grain size to see if I can reveal any instances of grain growth, or any other abnormality.
But before I finish this post for now, the failure is a brittle fracture. What this means in layman terms is that it just snapped with no indication of ductile failure as a weld would exhibit before the surfaces give way in, on, or near a suspect hear affected zone.
So we can at lease positively conclude, this pin is absolutely positively NOT welded at all.
I'll report back more when I finish investigating it.
Jimmy Hoffa...... FOUND!![]()
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