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

For 404-gr/.458-cal Shock Hammer:
Reduce COL by 0.100" and reduce powder charge by 4.0 grains of AA-2230.
This is with Hornady, W-W and R-P brass,
max charges to work up to:

3.28" COL: 72.0 gr
3.38" COL: 76.0 gr
3.48" COL: 80.0 gr
3.58" COL: 84.0 gr

Recall that the Norma-made brass might be 4 or 5 grains bigger in water capacity.
With Norma brass I had to go up to 86.0 grains AA-2230 with the 450-gr TSX
to blow a primer and get less velocity than 84 grains gave, at a COL of 3.565" IIRC.
Looking back at page 34 of this thread:







83 or 84 grains AA-2230 with the lighter 404-grainer in the Norma brass at 3.580" COL,
might be a safe way to work-harden that Norma brass.