Yeah the speeds shocked me. I wasn't expecting that much. I think it's on borrowed time. I need to check and see how much the throat has grown. I have to clean it 3 times before I get all the copper out using bore tech eliminater. Used to be only once.I never used the crony and just loaded some light just see what it would do. I will have get some new brass and fire form it and then put it to the test. You sure have that Swift smokin, how many rounds do you think before it's replaced?