Originally Posted by
littlejack
Years ago, I had two boxes of Selleir & Bellot (SP) 7.62x54. I brought one box to the range to play with. Foolish me, I didn't check out the cartridges before firing, or after, (Factory ammo, got to be good, RIGHT???). So, got back home, and a while later, decided to prep the cases for reloading. Low and behold, there were multiple cases split from the top of the case to the shoulder. Note: I had never had any split brass prior to that with either reloads or factory ammunition, so the chamber was right. I dumped out the second box of factory ammunition (unfired). Some of those rounds were split. So, I dumped all that ammo and fired brass, and haven't used any Sellier and Bellot ammunition since.
It happens.