Ahhh... another 444nut! I shoot three Marlins; a 444 current production, 444P (carbine), and 444T (longrifle favorite). I also shoot three bullets of my design; the TLC432-265-RF and a 300 and 350 grain version of it. As has been mentioned; H322, H335, and H4198 are great powders for sending a big chunk of lead downrange. Welcome to the 444!