Do you still have the loaded rounds that FTF? Change the OAL by pulling the bullets out a bit so they jam into the lands. See if they'll fire that way. Probably have to single feed. If they fire that will tell you that the primers are OK. and if they fire, make sure you don't push the shoulders back too far on the brass if resized. If they don't fire, push the primers out and get a good look at them. SMACK them with a hammer. That will tell you for sure. One step at a time till you figure things out. Mike.