The .22 WMR, or Winchester Magnum Rimfire, is a popular cartridge used for both hunting and target shooting. It was introduced in 1959 as a more powerful alternative to the .22 LR (Long Rifle) cartridge and has since gained a reputation as a reliable and accurate round. The .22 WMR cartridge has a bullet diameter of .224 inches and a case length of 1.055 inches and is capable of achieving velocities of up to 2,300 feet per second.

One of the key advantages of the .22 WMR is its versatility. It is suitable for a wide range of game, from small varmints to larger animals such as coyotes and foxes. Its relatively low recoil and low cost make it an excellent choice for target shooting and plinking as well. The .22 WMR is also widely available, with ammunition produced by numerous manufacturers and sold at most gun shops and sporting goods stores. Overall, the .22 WMR is a popular and effective cartridge that has earned its place as a favorite among hunters and shooters alike.