Aww you piker!  Why not a 7-1/2" Ruger Redhawk .44 Magnum with 180 grain Hornady XTP Jacketed Hollow Points at 1,700 feet-per-second with 1,155 foot-pounds of muzzle energy?  At that velocity you won't need to apply much "Kentucky Windage" to compensate for pesky coriolis forces that could deflect your slugs should your target be standing way across in the next shopping aisle.