22 magnum ammo, also commonly called 22 Winchester Magnum Rimfire ammunition is a rimfire cartridge introduced by Winchester in 1959. Although the "R" in "WMR" stands for rifle, the round has been successfully chambered in both rifles as well as revolvers; in fact, although Winchester developed the round, other manufacturers had chambered revolvers for it before Winchester had produced a rifle in that chambering.
The 22 WMR is a dandy little varmint round, provided the ranges don't stray too far beyond the 100 yard mark. Initially, the bullets were in the 40 grain range; but today, ammunition is available in a wide range of bullet styles from 25 to 50 grain. 22 Win Mag as a caliber produces velocities ranging from about 800 fps in revolvers to upwards of 2,300 feet per second in longer rifle barrels. Since the round produces higher velocities than the .22 LR, it is more popular for small game, especially varmints, and might even be a bit overkill at relatively close ranges. The wide range of factory-loaded ammunition gives the round quite a bit of versatility. The savvy hunter can stoke his gun with anything from the speedy 25 grain Hornady NTX to 40 grain offerings from CCI and Fiocchi to a 45 grain heavy hitter from Hornady and even a heavy 50 grain from Federal. And, even better, those weights come in a variety of bullet styles including full metal jacket bullets, hollow points, flex tips, and polymer tipped. You can see our line-up of all 22 magnum ammo for sale listed below: