I ran into an old guy at the range a couple years ago that had the .460, the .500, and the short .50ML barrel. He loved 'em, but wasn't happy with the .460's accuracy with 300gr XTPs. I found out later that the standard XTPs aren't made to handle that kind of pressure and may actually run pressures up because they're too soft, at least for revolvers. Barnes XPBs, hard-cast, or XTP mags are the answer as to pressure; accuracy is where you find it.
The XPB 250s are designed for the .454, the 225s for .45 Colt. The .225s have a taper towards the rear which ain't good, per Brian Pearce. I bought a couple boxes of the 250s for my ML. They are as long as the 300gr XTPs and the hole in them is very deep.
In case you didn't catch my drift, I'd try the .250 XPB. Be sure you use data developed for it as unlike the TSXs, these don't have the rings cut in them and data for lead core is too hot. Even at lower velocity, they should be deadly, in fact, I'm banking on it with my Knight.
Last edited by Pappy348; 10/13/15.
