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

I have some cast bullet ammo ready for testing.

The bullets painted with blue are loaded with 80.0 grains of AA-2230, 20 rounds of the 411-grainer (AM 46-425PG)
The bullets painted with red are loaded over 81.0 grains of AA-2230, 15 rounds of the 411-grainer, and 15 rounds of the 401-grainer (AM 46-410M).





I forgot that I tested the 407-grainer (AM 46-410M) back in August 2021 with 80 grains of AA-2230.
5 shots averaged 2477 fps at 5 yards from the muzzle of a 24" Ruger No. 1 .458 WinMag.
The 100-yard target was marred by vertical stringing as the forearm hanger screw had become bent and stripped.
See pages 48-49 of this thread:



I was so dashed by it all that I suppressed the memory.
I fixed the Ruger No. 1, and now check the screw after every 20 rounds.
44 rounds were fired on the day when the screw stripped and bent.

No need to do it all again with a "ladder" of powder charges.
I just need a stepstool of one more grain of powder increase.
And I will use a 25" Shilen barrel this time,
going for +2500 fps MV with accuracy.
Soon as I can get a day with no precipitation nor freezing temps at the outdoor range.
Merry Christmas and Happy New Year.