Today when I was priming some brass I had problems. Don't know why, that's why I'm asking. When I put the brass .223 shell in the shell holder for the rcbs hand primer the primers were hard to seat. Meaning some were hard others went in crooked and stuck out so much I had to take apart the hand primer to get the shell holder and shell out, then use the press to get them separated. After all that the bottom of the shell was roughed up and couldn't tell if something was wrong with the shell. Shells were all clean some carbon was at the top of the primer socket but pretty much clean. Was it bad primers or what? It happened to about 7-8 shells. Any ideas?