Hello to everyone. I'm a first time gun owner, Taurus millennium pro pt145, and any advice would be greatly appreciated. Took it to the range this weekend, put 50 rounds through it without much of a problem except for one thing. When I loaded the mag to capacity, and racked the slide to chamber a round the round would jam between the slide and the chamber, but when I only put 9 rounds in the magazine it worked fine. Any suggestions? Also, forgive me for being ignorant, but I must be mistaken on the meanings of single action, and double action. My Taurus is both, and I was under the impression that being double action meant that I could slap a clip in it and start firing, and that the pull of the trigger would both cock, and fire the gun, but I guess I was wrong. I had to either chamber a round, or rack the slide, and and lock it in the open position with the magazine removed, and once I inserted a loaded magazine and closed the slide it would automatically chamber a round. Once again, New to firearms, and any help, not ridicule, would be appreciated