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

Here is a great bullet that should Bagwell&Selous well in a .458 WM.
At .461" diameter sizing for best accuracy in .458" to 459" groove diameter barrels (THAT HAVE A SAAMI .458 WM THROAT !)
3.385" is the longest COL it can be loaded to in the .458 WM.
Longer than that jams into throat.
Maybe throat is the more important factor for the bullet sizing than a mere 0.001" difference in groove diameter.
For whatever reason or both reasons, .461" works very well in the .458 WM with cast bullets.

In a 23"-barreled .458 WM (McGowen .458"-grooved) at 3.385" COL,
a starting load of 65.0 grains of AA-2230 with no filler gave 1943 fps 5-yard velocity and good accuracy.





So, in Linotype and with PC paint and a gas check added it would be right near 500 grains.
Linotype is maybe too brittle to Bagwell&Selous well.
In 92-5-2-1 "hardball with arsenic" alloy it is 525 grains, harder, heavier, and less brittle than Linotype.
Probably would be about 530 grains in clip-on WW alloy which is softer and only slightly heavier than 92-5-2-1 alloy.
The clip-on wheel weights can be heat-treated harder.
92-5-2-1 alloy is my substitute for clip-on wheel weights.
92-5-2-1 alloy casts a larger diameter, less than 1% lighter, and harder without any heat treating other than water dropping.
Any hardness lost by tempering in the PC-painting process (375 to 400 *F for 20 to 30 minutes) is regained by aging for 4 weeks.