I bought a bad batch of Large Winchester primers. Out of the 1000, I had 30+ misfires. By inspecting the primer, there was a large dent from the pin. If I stuck the round with the dented primer back in the mag and fire it again, it fires fine.
I called up Winchester and they said that there were a lot of people complaining about misfires. However, I didn't get a refund or anything. So, I stick with Federal primers now.
"Rangers Lead the Way!"