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

158XTP,
It is about time you picked your sir name.
I recall your contributions and correspondence while this was going at the anchor baby's playpen.
No offense meant by association there, please.
Good time to review the state of 500-grainer loads for the .458 WM+.

Nowadays there is a plethora of powders and bullets to move 500-grains at 2150 fps MV inside of 3.340" COL and 60,000 psi,
in the SAAMI .458 Winchester Magnum.
Noncompressed ball powders or mildly compressed stick powders, take your pick.
Either can be temperature stable.

This is best so far for the .458 WM+, with AA-2460 and the 500-gr TBSH, by Sir Jerry,
and I will take credit for recommending AA-2460 to him after he recommended the 500-gr TBSH to me:



I have done not quite so fast with the 500-gr TSX and AA-2230.
Sir Bob and Sir Jerry are in close pursuit on the 450-grain TSX with H335 and AA-2460.
I have done a wee bit better with AA-2230 and the 450-gr TSX:



The 500-gr TSX at 2342 fps MV put two bullets in one hole, third was about 1 MOA to left,
maybe I flinched ?

This is what I based the AA-2460 recommendation on, to Sir Jerry:





Noncompressed 93% LR load with AA-2460 was faster and more accurate than
a compressed 103% LR load with H4895.
2265 fps and 2212 fps respectively.
Seating depth was only 0.240" with the 543-grain FNGC.
I might have to seat a 600-grainer a half inch deep.
Might not be able to make 3.5" COL with the FNGC 600-grainer I am looking at, it is so fat forward.
Might be able to make 3.3" COL in the SAAMI .458 Lott.
Will be looking to AA-2460 most likely,
for use in the .458 WM+ and .450 WM2.
Oh shucks, I am changing the name of last one to the ".450 Watts Winchester Number 2."
.450 WW2 sounds better than .450 WM2.

The .450 Watts Magnum was a member of the Post WW2 Baby Boom Generation.
It gestated from 1938 gleam in James Watts' eye to 1949 birth.
Yep, .450 WW2 is much more appropriate for the last laugh.
It performs just like the .458 WM+ with heavy bullets,
better than the SAAMI .458 Lott with birdshot and rat bullets, and the heavy bullets too.