Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

Comments from The Square Table about powder-coat painting of cast bullets are appreciated.
Collective Sirs: Buy a donkey.
The PC paint prevents lead exposure in bullet handling, but wash your hands anyway !
It allows us to hang the grease grooves out in the .458 WM throat without the mess of exposed grease.
Grease may be necessary to keep BP fouling soft, but not so with smokeless.
Even BPCR loads may use PC-painted bullets, as long as the grease is used too !

Proof of water is proof of life for concept of .458 BMW surrogacy for .458 WM+ fast-twist testing:
The .458 B&M was supposed to have a case length of 2.295" as originally conceived but B&M had to shorten it to 2.250" max,
due to problems getting bullets to fit in the magazine.
The .458 Lott suffers from same problem with some rifles.
So the .458 BMW is trimmed to 2.240" brass length per standard safety practices, and it is a tiny bit under 95 grains H20 gross.
The .458 WM+ is easily allowed to go to 2.505" max brass, trim to 2.500", and it is thus a tiny bit over 95 grains of H20.



Comparing the .458 WM R-P brass to Quality Cartridge .458 B&M brass, out of 10 carts, 3 were unusually heavy and of lesser capacity.
So three pieces of brass made from R-P brass for .300 RUM were added in to make 10 pieces of similar weight, length and capacity.
Quality Cartridge brass for the .458 B&M is most likely made from blank basic RUM brass from R-P:



Another possibility with 1:10" twist in a .458 WM+: Sabot loads with .358-cal. rifle bullets (not just .357-cal. pistol bullets) in .45-cal sabot.