The .357 Sig, according to all tests so far, exceeds the .45acp.
Proponents of the ":slow and heavy" camp (which is slowly becoming extinct due to constant proof that fast and light works) will argue this point, but the hi-energy, hi-velocity, deep penetrating .357 Sig is all around a better cartridge, especially for cops.
Texas DPS was not happy with the .45 and they are very happy with the .357 Sig. Texas DPS gives many accounts of the .45 failing them, and that is why they went to the .357 Sig, which is giving them much better results.
They tell an account of one shooting involving a new trooper with a .357 Sig and an older trooper with a .45. They were shooting at a man in a truck cab who was shooting at them. The .45 could not penetrate the truck cab and was worthless is stopping the bad guy. The .357 Sig went through and killed the perp, and the round is credited with saving their lives. Those were their exact words, so I am not hyping up the story.
So far there have been several shootings with the departments using the .357 Sig and they claim that it has that "lightning shock" effect when it hits the bad guy. They crumple down instantly. This is no surprise since the round is designed after the legendary .357 Magnum, but it actually more powerful from the standard carry platform. Of course the .357 Sig is going to work, and so far it has a stellar record on the street for putting bad guys down quick, according to the agencies using it.
I would not want to get hit with any of them, but the .357 sig is a superior round and I predict we will see it become very well respected in coming years. There is no more powerful mutant killer out of a compact gun than the .357 Sig. If you can cary a bigger gun, then the 10mm might be a good choice. There is no reason that the 10mm did not catch on more except that people are wimps and the recoil is too much. One of the fast and light 10mm loads like a 155gr load will deliver twice the energy and devestation of a .45, and give good barrier penetration without overpenetrating flesh.
The 125gr .357 Sig moves out of my Glock 32 at just under 1450fps, having a very high likelyhood of full expansion due to the extreme velocities, meanwhile penetrating a perfect amount of depth (about 15" of gelatin) and delivering up toward 600 foot pounds of energy (which, according to real cops shooting real people, seems to make people "feel" the hit more and drop faster like getting kicked in the gut, which is what they call the "lightning strike" effect of the .357 Mag. Officers say that when they hit people with this high energy round, that the person reacts like they were hit with a "shock", rather than low energy rounds that tend to allow pumped up bad guys to keep going and not realize they have been hit until they bleed out. No doubt blood loss is what ultimately stops people, but real shootings tell us that high energy round have a more dramatic effect like getting a kick in the guts that tends to make people crumple over and cease their actions)
The .40 is also an excellent round, and I tend to use the .40 around the house where I want less barrier penetration. But, when I go out, I use the .357 Sig because it is a better overall package, especially for cops who often need to shoot through barriers but still get outstanding performance in flesh.
[This message has been edited by Red Bull (edited February 26, 2000).]