>>Now we use a 9MM (.351 dia) and call it progress.
Yes, we do.
.38 LC 125 gr. 772 ft/sec. 165 Ft-lbs x 6 rounds typically
9mm 124 gr. 1150 ft/sec. 364 ft-lbs x 13-17 rounds
.45 ACP 230 gr. 855 ft/sec. 373 ft-lbs x 8 rounds
Ok you and are going to have a duel at 50 paces. There are two single shot pistols to choose from; a .45 ACP and a 9x19 mm parabellum. I’ll let you pick first. Which do you choose?