Originally Posted by jwp475
If a Lott is a rechambered 458 Win mag then all is good with the Lott, otherwise 👎

Sir John,
That is not true. The .458 Lott can be improved with the new throat, becoming able to equal the .458 WM+,
but it still suffers in another way.
When you take a cartridge meant for a 3.4" mag box,
lengthen the brass by 0.3" and then stick it in a rifle with 3.6" mag box, only 0.2" longer,
you are screwing up by 0.1".
That is a pretty sloppy tolerance for gunsmithing.
It stinks !
Like engraving the rifle with a brick !

By SAAMI spec, the .458 Lott is missing 0.1" of nose room for bullet fit.
You either have to trim the Lott brass shorter or accept exceeding SAAMI COL
for something as simple as using the 450-gr TSX bullet in the .458 Lott.

Nowadays the bullet makers have shifted to shorter-nosed .458 bullets
so as not to hurt the feelings of the .458 Lott crybabies.

The smart thing to do if wanting to upstage the .458 Winchester Magnum
by sticking it in a 0.2"-longer rifle action would be to make the brass 0.2" longer, not 0.3" longer.
The answer is the .458 Watts Express 2.7".
That is a cross of .450 Watts Magnum (2.850" brass) with .458 Winchester Magnum (2.500" brass).
2.7" brass case and .458 Winchester Magnum throat same distance from breech face.
Re-chamber a .458 WinMag with no setback of barrel.

New name for this wildcat: .458 Watts-Winchester = .458 WW for short.
Splitting the baby on that would be a 2.675" case length, but 2.700" is NO PROBLEMO.

This adds no power to the top-end .458 WM+ loads with heavy bullet,
unless used in a single-shot or +3.8"-length magazine.
But it will allow use of 250-grain bullets at faster velocities and lower pressures than the .458 Lott,
could even better the .458 WM+ with the proper 250-grainer, allowing longer seating depth and longer COL.
Allows better grip on a 404-gr Shock Hammer at longer COL.

404-gr Shock Hammer loads:
.458 WM+: 3.38" COL and +2500 fps
.458 WW: 3.580" and +2600 fps
SAAMI .458 Lott: 3.580" and less than 2600 fps at higher pressure due to SAAMI Lott throat, short and tight.

The .458 Lott is still the champ with bird shot, almost as good as a .410 shotgun up close.
Excellent for rats and snakes at close range.

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.