And another one who is ignorant of Kinetic Energy. Ok. Newton’s Third Law, any action has an equal and opposite reaction. If the bullet that is fired by the .45 ACP is so powerful that it would knock someone down, then firing the bullet would in turn knock the shooter down. It would look like this. But since every time someone shoots a .45 ACP they don’t look like Will Smith in Men in Black firing the “Noisy Cricket” we know that isn’t the case don’t we?” Now, if you want real world information, instead of the mythical nonsense fed to you over the years, try this video on for reality. That study was done with information from over a thousand real world shooting events. Not the nonsense from one or two people who talk about knock down power mythology. The .45 ACP has essentially the same one shot stop statistics as a 9MM. And there are more than a few events where someone dumped a magazine plus of .45 into a baddie and they kept on coming. There are four ways that a bullet kills someone. 1) Vital Organ. Head or heart basically. Generally speaking if you hit either the brain, or the heart, the baddie is going to die. 2) Exsanguination. This means that you bleed to death. The faster that the red stuff flows from a body, the faster this means of death occurs. 3) Suffocation. The chest or lungs fill up with blood, and the individual literally drowns in his own bodily fluids. Again, faster is better generally speaking. Number four. This is all others. Lead poisoning, Shock. Embolism from a blood clot, a chunk of bone, or fat, in the blood stream. This is realistically speaking, impossible to plan for. But people do die from it so we have to include it. In none of those, is the .45 superior to the .357, or the 5.56. The 5.56MM causes an effect known as Hydrostatic Damage. In other words, the bullet strikes the human body, and the liquids that make up a vast majority of us, say about 70%, is compressed by the fast moving bullet. This can’t actually happen, liquids do not compress, so the shock wave spreads outwards, and tears up additional flesh. That torn flesh bleeds more than the hole would, thus causing faster loss of blood, and speedier arrival of the number two method of death. If you want to know what this looks like, toss a rock into a pool of water. You have an example of Hydrostatic force, the waves radiating outwards. Also, the through and though wound would allow blood to flow out of two holes. Presuming that the individual did not die faster from a vital organ being destroyed. Now, we have ended the nonsense about “knockdown power” and shown that stopping power of the .45 in real world, instead of mythic Hollywood and other fictional sources, is essentially equal to other handgun rounds. We have explained how bullets kill. From experience, this is where the .45 lover will insist I have no idea what I am talking about, and none of those links are telling the truth.