Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

I figured out why the HODGDON ANNUAL MANUAL lists .458 Winchester Magnum loads but skips right over the .458 Lott.

Simple, as demonstrated by the Hornady lab data.

Just load the .458 Lott with same bullet at 3.600" COL as used in the .458 WinMag at 3.340" COL and
use same powder charge and primer in both.

The tighter throat and shorter free-travel in the .458 Lott will give it 50 fps more velocity at 2,500 PSI higher velocity.
Close enough.
Just be careful not to exceed a maximum SAAMI .458 WinMag load (60,000 PSI) in a SAAMI .458 Lott.
If you do, you will likely be exceeding the SAAMI MAP for the .458 Lott (62,500 PSI).
Reduce powder charge by 10% and work up for the .458 Lott.
Thus, there is no need for .458 Lott data.
The .416 Remington Magnum has a SAAMI MAP of 65,000 PSI if the low-pressure SAAMI .458 WinMag is not exciting enough.
If you cannot kill it with a .458/ 500-grainer at 2200 fps and 60,000 psi or less,
maybe shootaway has been cleaning your barrel.