I just rebuilt the trigger with the MCarbo trigger rebuild kit and after two or three rounds, I got a failure to fire. I racked it and checked, the primer was dented, then it ran a couple more shots fine, then it failed again in the same way. Racked it again and got a couple more good shots, then another failure to fire. I didn’t make any changes to the hammer or bolt other than to clean them up while I had the rifle apart. Any suggestions as to what I did wrong?