45Man - Keep us posted on the performance of your loads on game. Brian Pearce of Handloader did an article on loads for the S&W 625's using the logic that the 45ACP revolvers are capable of using +P loads at about 23K PSI, and applied that to the 45 Colts. I have a copy of it somewhere, but the data is probably available on Loaddata.com if you're a subscriber. I was going to try the 13.0 grain load using Hornady 250gr XTP's, but I felt they were a little harder and probably wouldn't expand at impact velocities at 50 yards or more. Power Pistol is supposed to be another good powder yielding above average velocity for the 23K PSI limit. I believe you're right about the New Frontier and it's limitations. I wouldn't push a pretty gun like that much more.