Remember, if you have a SAAMI .458 WM or a .458 WM+ with 1:14" twist,
you too can shoot paper-patched bullets with BP.
But you gotta use a little harder alloy like 20:1 lead:tin.
And you gotta have a slick of about .450" to .452" diameter
(swaged rifle slicks of 530-grains are sold in .451" diameter at Buffalo Arms)
and patch it up to .458" to .459" diameter.
The .458 WinMag throat is thus perfect for paper patch work with BP or duplexed BP.
Clean shooting with the duplexed BP, no wiping or blowing for 50 shots or more.
The paper patch wipes it with each shot anyway.

The no-throat and slow-twist .45-70 requires a BPCR load as perfected by Sir Jerry.

[Linked Image]

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.