The 460 doesn't really seem to offer much over the 454 Casull, at least to me. Smith is using a super lightweight bullet for a big 45 case (even the 45 Colt loads typically exceed 300 grains now) to get outlandish velocities while producing ridiculous pressures in a boat anchor size handgun. At least with a 45 Colt or 454, the handgun is packable without giving yourself a hernia.

Still, the 460 with heavier bullets will probably be a decent hunting handgun, much like a TC Contender or XP, but like the 460's bigger cousin the Smith 500, seems just too big (in the X frame) for a backcountry sidearm.

Energy numbers really don't mean much of anything IMO.