I took the 8 MM M48A out this morning and noticed that, in the first twenty rounds, one had a primer missing on the spent cartridge. I didn't notice anything unusual with the shooting, bolt action, etc. But, when looking at the spent casing it is obvious that something was amiss. At first I thought the pin you can see in the photo was a piece of broken firing pin but then I realized I had fired over thirty more after that. When I cleaned the gun I inspected the firing pin and it looks fine. Can I assume the firing pin penetrated the primer, pulling if off, or could it be possible the blow back blew the primer off? The gun fired fine on everything after that. I took the gun apart and never found the remainder of the primer. The cartridges weres Berdan primed and the casing says 1942 for the lot date on the rim. Any ideas? Klaus, I know ya got a couple...any thoughts big guy? I shot all that I had so that lot is gone.....whew. BTW....the dang gun is one monster that is to be reckoned with. It's highly accurate and kicks like a mule in heat. Contrary to range rules......and without them realizing it, I aimed at a rock on the side of the hill, roughly 300-400 yards out and it wasn't too dang far off!!!!!!!!! WHOA!!!!!!