I have used only two S&W all steel 45's, the 645 and 945. Both have been suoer reliable feeding anything from 185 gr. LSWC to 230 gr FMJ's. I use the 945 for bullseye pistol matches and some pistol games. The 645 is used in some pistol games and is carried in my car.
I recently purchased he full size M&P45 which has proven to be equally reliable but with a very gritty trigger.