For what? The .45 was designed as a personal defense round after extensive testing that included shooting pendulums, cadavers, and live animals (in 1903). It remains one of the best rounds for that purpose.The .44 Magnum was developed ( from the .44 Special) for long-range handgun hunting by (among others) Elmer Keith and Remington Arms Co. While it can be used for personal defense, the recoil and muzzle blast make it less than optimal for that purpose. Even Dirty Harry (in Magnum Force) admitted he used a light .44 Special load at the range.
I’m not sure any of us is going to be able to make much sense out of your question, but I’ll give it a try.First, what do you mean by “.44 magnum super”? The typical round referred to by the term “.44 magnum” is the .44 Remington Magnum, which has a bulet diameter of .429″. Gates developed an extended version of this cartridge called a .445 SuperMag, delivering the same bullet out of a slightly longer case at a muzzle velocity 30–40% higher than the original .44 Remington Magnum. It is a rare cartridge and not generally referred to as “.44 magnum super”.Second, when you say “.40 bullet” do you actually mean bullet, or are you referring to a .40 cartridge like a .40 Smith and Wesson?As noted above, the diameter of a .44 Magnum bullet is .429″. A .40 Smith and Wesson cartridge uses a bullet with a diameter of .40″. A .40 S&W cartridge will not chamber in a .44 Remington Magnum firearm. In fact, with a case and rim diameter of .423″, it is smaller that the barrel bore diameter of a .44 Remington Magnum firearm. In trying to chamber the .40S&W cartridge in a .44 Magnum firearm, the entire .40 cartridge would pass through the barrel of the ,44 Magnum.So, no. A .40 bullet (in a .40 S&W cartridge) will not “fit and shoot” out of a .44 Magnum firearm.
There’s more to the equation in determining “kick” (or recoil felt by the shooter), than muzzle energy, but that’s a good place to start. A typical 230 grain .45 ACP round leaves the muzzle at 845 ft/sec delivering 365 ft-pounds of energy. A typical 260 grain .44 Magnum round leaves the barrel at 1450 ft/sec while delivering 1214 ft-pounds of energy.The 44 Magnum has more than three times the energy (1214/365) of a .45 ACP. If fired from a typical .44 Magnum large frame revolver, the weight of the gun will mitigate recoil somewhat. If shot from an ultralight scandium frame revolver, the energy problem will be exacerbated.Most .45ACP handguns are pretty stout as well, but a stainless 1911 is still lighter than a large frame revolver. If I had to assign a number to it, I’d guess that .44 Magnum has 2-3 times the “kick” of a .45 ACP.
Percentage is kind of a offset to use on being shot in the head when it comes to surviving a bullet injury to the head it all depends on the angle at which you were shot and then caliber of the bullet play the 2 biggest factors. Unless your point blank with the barrel between their eyes you never know if its a instant,gradual death,or just a serious wound.
There are two “.45 Colts” in common use: .45 Long Colt (used in the Colt Single Action Army) and .45ACP (Automatic Colt Pistol; developed for the Colt M1911). Because you’re comparing it to another revolver round, I’ll assume you’re talking about .45 Long Colt.The short answer is, the .45 Long Colt is the bigger bullet, but the .44 Magnum is the more powerful cartridge:The .44 Magnum has the same case length as the .45 Long Colt, because the .45LC was designed for use with black powder, which is less dense than modern smokeless powders used by the .44 Magnum. Modern .45 Long Colt cartridges commonly use smokeless powder as well, they just use less of it, so there’s some empty space in the cartridge casing. The .44 Magnum is almost totally full of smokeless powder. So, the .44 Magnum generates higher chamber pressures, which equals a faster and thus more energetic bullet.