The .22 Winchester Rimfire (often abbreviated as .22 WRF or .22 Win Rimfire) is a rimfire rifle cartridge that was introduced by Winchester in 1890. It was designed to be a more powerful option than the .22 Long cartridge, but not as powerful as the .22 Winchester Magnum Rimfire (WMR) cartridge.
The .22 WRF cartridge uses a 45 grain bullet, typically with a lead round nose or hollow point. The cartridge has a case length of 0.963 inches and an overall length of 1.296 inches, which allows it to fit into standard rimfire rifles.
The .22 WRF cartridge is known for its higher velocity and greater stopping power than the .22 Long cartridge, but not as powerful as the .22 WMR cartridge. It is ideal for small game hunting, target shooting, and plinking.
Ammunition for the .22 WRF cartridge is available from a limited number of manufacturers, including Winchester and Aguila. It is available in a range of bullet weights and styles, including round nose and hollow point.
Overall, .22 WRF ammunition is an excellent choice for shooters who want a more powerful option than the .22 Long cartridge, but not as powerful as the .22 WMR cartridge. Its higher velocity and greater stopping power make it a popular choice among shooters of all levels of experience. However, due to its limited availability and relatively low popularity, it may not be as widely available as other rimfire cartridges.