Anybody tried power pistol in the 500L? I'm thinking about trying it as a practice load under some of the 425-480gr style bullets and would like some starting load ideas. My main three bullets I'd like to try are a 425gr LBT wfn, a 435gr LBT lfn, and an RCBS 50-450fn that weighs 481gr with my alloy. All are going in starline brass with lrp.