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

Sir Bob,
It is done, the multiplier is now 2500 lbs per 1.000 unit of BPI.

Wow ! A SAAMI .458 WinMag turning out 2.000 TBPI works with proper soft point loads on well placed body shots
on game up to 5000 pounds.
4000-pound hippo, no problemo.
For a 7,700-pound white rhino, elephant, or whale, switch to nondeforming FN solids.

Or use TBPI as a rough gauge: 1.000 = 1 H&H unit of TBPI

The .30-06 with 180-grainer at 2750 fps is about half an H&H unit.

The .458 WinMag with 500-grainer at 2150 fps is about 2 H&H units.

I have shot only one moose in Alaska with a .458 WinMag, a cow weighing about 800 pounds.
A handloaded 500-gr Hornady RNSN started at 2150 fps MV caused a DRT-bang-flop at 100 yards,
even though the jacket separated from the core of the bullet.
One rib was broken going in, three ribs were broken on the offside.

I would guess her average consort would weigh about 1200 pounds,
but there are indeed some giant old bull moose near a ton.
Just like there are average bison bulls that weigh 1300 pounds at 3 y.o. and 1600 to 1800 lbs at 5 y.o.
older ones over a ton,
and the rare giant close to 3000 pounds.
The .458 WinMag will handle them all with proper bullet and proper placement from proper range.

If sniping at 3000-pound animals from long range, use a TBPI of 1.2 at impact,
since (1.2 TBPI) x (2500 lbs/ 1.0 TBPI) = 3000 pounds.
Buy a donkey Sir Bob, for the calibration.