HansGruber
Ronin
Right. That may have been true 30-40 years ago, but not so much today.It's not as simple as ' if high-tech expanding bullets make the 9mm acceptable, then that same technology in the larger .45 ACP ought to be awesome.' I agree that the technology may help both calibers. However, the 9mm travels at significantly more velocity that the .45, which will affect expansion. My point is that it is not an 'apples to apples' comparison. FWIW I have a Prodigy on my nightstand and more often than not carry a single stack 1911 in either .45 or 10mm with at least 2 spare mags. Never feel inadequately armed with any of them.
Bullet design has more effect on expansion than velocity will.
Bullets are designed to open to optimum expansion *while still* ensuring proper penetration at a certain velocity window.
Overdrive the bullet, and you will often get *less* expansion as the petals fold back flat to the bullet shank.
So…in modern design bullets—HST, Ranger-T, etc…velocity is not as important. Look at .45’s that are getting .75-1.0+ expansion regularly, in reliable tests.
Again, all things being equal—a .40 will make a bigger hole than a 9mm, and a .45 will make a bigger hole than both of them.