barrel(if it's a fully-supported model). That's 650 ft lbs, and reliable expansionof the jhp. Use the Corbon PoweRball bullet, and feed reliability is assured. Better yet, use the 117 gr Aquila 4 segment prefrag bullet, reloaded to 1500 fps in 4" barrel.More shock and tissue damage, more controlable in a lw ccw gun.590 ft lbs. the former load has a 22 recoil factor, the latter has the same 18 factor as does .45 ball ammo.