I've noted you have written about it before.
Back in the 70's, I fired one shot out of an 8 1/2 pound .505 Barnes Supreme, a .50 on the .378 WTBY case. One shot
standing and it spun me around like a weather-cock. My shoulder hurt for 20 minutes. Then I went back to shooting my
.375 H&H BRNO and that felt like a .222. The BRNO was heavy and a pleasure to shoot.
Seems to me iirc, the load was 125gr. IMR3031 for 2,600fps with a 600gr. Barnes bullet.
At that time, the .460 was using 125gr. H4831, a much slower powder.