I wish I knew were some of my reloading books were cause I could offer a starting point with the Power Pistol and the 147gr (the joys of moving cross country). Yeah the 12lb spring will help alot, good to have people like that to talk to. Im from VA and I go to school at OSU, my dad and his buddies are my "think tank" with this stuff and it takes longer to get ideas worked out doing it over the phone instead of at the range or gunstore. Thats why i joined up with OSA ha ha. Good luck with the uspsa.