.22_Winchester_Centerfire
.22 Winchester Centerfire (.22 WCF) is a small centerfire cartridge introduced in 1885 for use in the Winchester Model 1885 single-shot rifle. Factory manufacture of ammunition was discontinued in 1936. The .22 WCF was loaded with a 45 grain bullet with a muzzle velocity of about 1550 feet per second, similar to the performance of the .22 Winchester Rimfire (.22 WRF) designed in 1890.[2][3][4][5]
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Experimentation with the .22 WCF among civilian wildcatters and the U.S. military at Springfield Armory in the 1920s led to the development of the .22 Hornet cartridge.[6]