The .44-40 Winchester, also known as .44 Winchester, .44 WCF (Winchester Center Fire), and .44 Largo (in Spanish-speaking countries) was introduced in 1873 by the Winchester Repeating Arms Company. It was the first metallic centerfire cartridge manufactured by Winchester, and was promoted as the standard chambering for the new Winchester Model 1873 rifle. As both a rifle and a handgun caliber, the cartridge soon became widely popular, so much so that the Winchester Model 1873 rifle became known as "The gun that won the West." History When Winchester released the new cartridge, many other firearm companies chambered their guns in the new round. Remington and Marlin released their own rifles and pistols which chambered the round, Colt offered an alternative chambering in its popular Single Action Army revolver in a model known as the Colt Frontier Six-Shooter, and Smith & Wesson began releasing their Smith & Wesson New Model 3 chambered in .44-40. Settlers, lawmen, and cowboys appreciated the convenience of being able to carry a single caliber of ammunition which they could fire in both pistol and rifle. In both law enforcement and hunting usage, the .44-40 became the most popular cartridge in the United States, and to this day has the reputation of killing more deer than any other save the .30-30 Winchester. The cartridge was originally sold as .44 Winchester. When the Union Metallic Cartridge Co. (UMC) began selling their own version of the cartridge, it adopted the name .44-40 (shorthand for .44 caliber and the standard load at the time of of black powder), as it did not want to offer free advertising for one of its competitors. Over time, the name stuck, and eventually Winchester adopted the .44-40 designation for the round after World War II. Winchester uses the designation "44-40 Winchester" on packaging. Technical background The initial standard load for the cartridge was of black powder propelling a round-nose, flat-point bullet at roughly . Winchester catalogues listed velocities of by 1875. In 1886, UMC also began offering a slightly heavier, , bullet at , also with 40 gr of black powder. Winchester soon began to carry the 217-gr loading, as well, but in 1905, UMC discontinued the heavier load. In 1895, Winchester introduced a cartridge bulk loaded with of DuPont No. 2 smokeless powder and a bullet for , and in 1896, UMC followed suit with a 217-gr bullet at . Soon, both companies