I have 1K of these in Large Rifle and almost 1K in Small Rifle.
Got them on a trade years ago-If I remember right, the SR were very hard to seat in most cases.
They did all go pop when used..Bill.
I managed to snag a 5k case of CCI 450 primers last night on Midway. I had a restock announcement show up in my email, got my order in as fast as I could, and within 10 minutes of receiving the first email, they were out of stock again...