Hooray ! Pac-Nor shipped my barrel yesterday. Ought to be here by Halloween to become a .458 WM+ on an FN Mauser action. Same rifling as on the .458 B&M+, but is a no. 5 sporter instead of no. 4 sporter. That will provide another comparison of short barrel to longer barrel for velocity. This assumes the .458 B&M+ with 3.000" COL is equivalent to the .458 WM+ with 3.260" COL, etc.
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.