May not be 100% correct, but as I understand the need that helped drive the development of the 1911 & the 45 ACP, it was the need to have more stopping power than the 38 long revolvers in the conflict in the Phillipines with the Moro tribe.
Yes, but powder and bullets for a 38 have come a loooong way in the last 100+ years.
Edited to add a quick trip to wikipedia indicates 38 Long Colt had a 150 gr slug loafing along at 770 fps.
