i have one of these in a guide gun, and i put a decelerator pad on it pretty quick. I also played with a few of the firewall loads and tamed them back pretty quick, actually not needed. Brian pierce had a good article on loading for the 45.70 a few years ago, and i try to keep the 405grain bullet at about 1600fps, more than factory but not knock your teeth loose. I am going to buy one of the john wayne type levers, the one on the gun twists my hand when you fire it.