OK I have been posting lately about my recent purchase of an M&P 340. I have a friend with a 340 PD which has a titanium cylinder versus my gun's steel cylinder. His gun and the 340sc have stamped on the barrel "no less than 120 gr bullet". My gun does not have that stamp. My question is can I fire something like a 110 gr bullet in my M&P versus my friends PD model?