The “458 Winchester Magnum, all the cartridge you’ll ever need” thread

[BigHill]

For the record, Norma PH 450 gr, SD 0.371. 416 Rigby that is.

 

[CZDiesel]

For the record, Norma PH 450 gr, SD 0.371. 416 Rigby that is.

Aaand? I’m confused!?!? Because for the record 550gr, SD 0.375. 458 that is…

 

[Piet-Vis]

.458 WinMag once-fired brass, not re-sized, not de-primed, and at 2.500" length by calculation if actually shorter, to level the playing field, gross water capacities in grains:

W-W Super (post 1996): = 94.9
R-P = 94.8
Hornady = 94.6
Federal plain brass = 94.6
Federal nickel-plated = 94.4
Norma = 99.3 grains
Peterson Wildcat Tubes fire-formed in .458 WinMag and trimmed to 2.500" = 93.8

Pending first firing of Lehigh Defense .458 WinMag, TBD, it looks near identical in cross-section to the Peterson-based brass, and like the Peterson will probably be just a little under 94.0 grains H20 gross.
I have some Qual-Cart brass for .458 WinMag on the way to be looked at also, first time for me on that one too.

Norma brass is the only big outlier,
The effect is that Norma brass can be loaded about 0.100" shorter in COaL and produce the same net case capacity as the others.

QuickLOAD default case capacity for the .458 WinMag was 95.0 grains H2O last time I looked.

W-W, R-P, Hornady, and Federal are all about the same, interchangeable in loads.
Treat them as being of the standard case capacity for .458 WinMag.
If you have a Norma-cased load and move it to a "standard case capacity" brass,
then you need to load those 0.100" longer in COaL.

Is Norma cases not the answer then if a person wants a bit more oompfh out of a 458?