With a 22" barrel in the .458 Winchester, it's no trick to get 2200 fps with a 500 grain bullet and AA2230, without dangerous pressures, at least in my rifle. AA2230 is a better powder for the .458 than 4895 because it is denser.

Longer range? Using H4198 and the 350 grain TSX, I can get 2700 fps. That equates to 5700 foot pounds of energy.

The Lott is a solution looking for a problem that doesn't exist.