Originally Posted by bcelliott
A bit outside the current topic in the thread, but has anyone sectioned any .458 Win Mag brass? I'm interested in how cylindrical the I.D. is (and how far down) compared to the outer taper before or after full length sizing.

Never off topic if it can be related to the .458 WM in any way.
I cannot get anymore technical than to say that of the 5 types of brass I load with .458 WM and .458 WM+ equivalent loads, all look good.
Hornady LOOKS the strongest to eyeball with no concerns about metallurgy for any of them that I can speculate about.
Repetitious below, with some slightly different angles and lighting:

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In my lots of brass, the Hornady(H), Remington(R-P), and Winchester (W-W Super) .458 WM brass (at 2.500" length)
are all about 94.5 grains gross water capacity, once-fired, not re-sized.
The Starline .45-2.6" brass (at 2.600" length) is about 2 grains bigger in H2O than the H, R-P, and W-W.
The Norma .458 WM is about 5 grains bigger in H2O than the H, R-P, and W-W.
I can only speculate about why that is so.
Your brass lots may differ.

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.