Buffalo Bore cranks out 44 mag +P+ loads that give you a 340 gr. @ 1478 fps for 1649 ft. lb. , that's a .454 . Interesting side note is that they're not for use in S&W revolvers . Combine the above with a 4 5/8 " Super Blackhawk and you have a gun you won't know your packing that will do the trick .