What is 45 winchester magnum?

The .45 Winchester Magnum is a revolver cartridge developed in the 1970s by Winchester based on the .44 Magnum case. The cartridge was designed to provide more stopping power than the .44 Magnum for use in hunting and self-defense. The .45 Winchester Magnum has a bullet diameter of .452 inches (11.5 mm) and a case length of 1.285 inches (32.6 mm). It is capable of firing a 230-grain (15 g) bullet at a muzzle velocity of 1,450 feet per second (440 m/s), producing a muzzle energy of 1,015 foot-pounds (1,375 J).

Although the .45 Winchester Magnum was well-received among firearms enthusiasts, it never achieved widespread popularity due to its high recoil, limited bullet selection, and the popularity of other handgun calibers such as .357 Magnum and .44 Magnum. The cartridge is now considered relatively rare and is primarily used by collectors, handloaders, and hunters who appreciate its power and performance.