I loaded up some 230 gr. FMJ rounds for practice. The load was 7.0 gr. Power Pistol, the starting load according to the manual, which should have been about 800-830 ft/sec. They were very hot for some reason. They chronoed about 930 ft. sec out of a Kimber 1911. No signs of over pressure at all, but I did not want to cause wear to that gun, so I stopped shooting them in it. They shot fine out of my Ruger Blackhawk, but I decided to test them in my g36. No signs of overpressure in any gun, but they barked and recoiled like an SOB. Accuracy was good, and the g36 never had any reliability problems. It seems to be a sturdy little gun. If you want to load .45, I don't think power pistol is the best powder. I would start lower than the manual says or use something else. Bullseye and Unique work, and I think VV N340 might also work well.