Went to the range with my .300 BLK (among others) today, and my .300 BLK had its first malfunctions today. I was using an ammo I've used quite a bit without issues, and liked because it was cheap and reloadable - Armscor. With the malfunction, the forward assist didn't do anything, but I was able to pull back the charging handle to eject the cartridge. An unspent cartridge came out and fell to the ground as well as a smaller piece - a primer. I figured one defective round, not too big of a deal, then continued shooting, but paying close attention. Eventually, I picked up and checked the unspent cartridge I'd ejected - its primer was still in place and everything looked fine. It was apparently the previous one that the primer came off of and jammed things. After 5 shots or so, another malfunction. This one required more effort to clear. Had to pound on the charging handle pretty firmly. This time, a spent case came out, primer of course having been blown out. So now two blown out primers from the same box of factory-new ammo. A little harder to ignore. Is this a fluke, or has anyone heard of similar issues with this brand? As I mentioned, I've gone through a number of boxes of this brand for my .300 BLK, but this is the first time I've had issues with it.