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

I was shocked to see how this load progressed in increasing 3-shot "group" size.







The third 3-shot "group" at 50 yards:



The tenth shot is the last one on paper:



The last of that load was wasted into the dirt.
Cannot fully explain this, but it seems that with 0.459" diameter and soft alloy, +1400 fps is too much, in a .458 WinMag.

Smacked with BP in a .45-70 might make a big difference.