[Ruy Dias de Bivar]

The .45ACP. Specifically designed back then to stop moslem Juramentados when the .38 (.361 diameter)long Colt would not.
Now we use a 9MM (.351 dia) and call it progress.

[rktman]

Lib speak for progress when you actually move backwards. LOL!

[Blue Jays]

I am a good person and do not wish to be hit by ANY caliber bullets if it can be avoided! :-)

[central_va]

I predict the US Military will go back to using .308 and .45 ammo. Bet on it.

[Bryanw92]

>>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

[Squantos]

When stationed at Clark AFB in the Philippines I lived off base. My first purchase on the blackmarket there was two 1911A1’s with a dozen mags a couple hundred hounds of 230gr ball ammo. Next buy was a Model 12 Winchester and a hundred rounds of No# 4 Buck. All three firearms had “united states property” markings ...... never felt safer. Model 12 was a house gun an the 1911A1’s were for me and the wife to carry .

[marktwain]

The .30-40 Krag also had problems stopping drugged up Juramentados.

The Krag ballistics are not far below a 7.62x51 (.308), and used round nose bullets in the Philippines.

For a 220 grain bullet, the Krag 1974 fps.

For a 220 grain bullet, the .308 2226 fps.

It is about a 20% difference in energy, but the Krag has more than 5 times the energy than the .45 ACP.

The .38 long Colt was fired at 770 fps, about 200 foot pounds.

The 9X19 (many bullet weights) has typical energy of 365 foot pounds.

The .45 ACP has typical enery levels of 373 foot pounds.