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22 WMR Ammo For Sale


Type Rimfire
Place of origin United States
Production history
Designed 1959
Manufacturer Winchester
Produced 1960–present
Parent case .22 WRF
Bullet diameter .224 in (5.7 mm)
Land diameter .219 in (5.6 mm)
Neck diameter .242 in (6.1 mm)
Base diameter .242 in (6.1 mm)
Rim diameter .294 in (7.5 mm)
Rim thickness .050 in (1.3 mm)
Case length 1.055 in (26.8 mm)
Overall length 1.350 in (34.3 mm)
Rifling twist 1-16″
Primer type Rimfire
Maximum pressure (C.I.P.) 23,206 psi (160.00 MPa)
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                   22 WMR Ammo For Sale

The .22 Winchester Magnum Rimfire, also called .22 WMR.22 Magnum.22 WMRF.22 MRFor .22 Mag, is a rimfire cartridge. Originally loaded with a bullet weight of 40 grains (2.6 g) delivering velocities in the 2,000 feet per second (610 m/s) range from a rifle barrel, .22 WMR is now loaded with bullet weights ranging from 50 grains (3.2 g) at 1,530 feet per second (470 m/s) to 30 grains (1.9 g) at 2,200 feet per second (670 m/s).

The .22 WMR is an enlarged, more powerful version of the much earlier .22 WRF. Despite frequent claims to the contrary, it cannot be safely used in any firearm except those specifically chambered for it. Even firearms chambered for the .22 WRF are not suitable; for one thing, the case lengths are different, and the fact that the cartridge fits into the chamber does not guarantee that using the wrong cartridge is either safe or effective.

The .22 WMR was for a time the most powerful rimfire round available; it even outperformed the .22 WCF. It has since been eclipsed in velocity and overall kinetic energy by the .17 Winchester Super Magnum.

Commonly available in retail stores, the selection and availability of the .22 WMR nevertheless do not match the popular .22 Long Rifle. Furthermore, .22 WMR is typically much more expensive than .22 LR per round, though it is comparable to .17 HMR, which is much more similar in overall performance, and is less expensive than .22 caliber centerfire ammunition.

Because many of the rifles that are chambered for the .22 WMR have tubular magazines, the bullet noses generally are flat or at least blunt to allow smooth feeding and reduce damage to the bullet. Although a pointed bullet in a rimfire cartridge will not contact the primer of the round in front of it (which is a hazard with centerfire cartridges in a tubular magazine), the manufacturer’s stamp is in the middle of the base of a rimfire cartridge, and this may interfere with pointed metal bullets in a tube. However, Remington, CCI, and Hornady now produce bullet designs with 30 or 33-grain (2.1 g) polymer plastic ballistic tips that reduce the hazards of pointed ammunition in tubular magazines.

Bullets for the .22 WMR are generally unlubricated lead with heavy copper plating, in either solid nose or hollow point style designed for small game hunting or pest control (varmint hunting).

The limited selection of commercial ammunition for the .22 WMR has inspired specialist wildcatters to select the .22 WMR case for handloading high performance rimfire ammunition. Generally they load the wildcat cartridges with pointed bullets for the aerodynamic advantages, using the same bullets as those in .22 caliber centerfire cartridges. Though such bullets are generally heavier than standard .22 WMR, the sharp nose and tapered tail conserve energy better, delivering greater impact at longer ranges.

Other wildcatters neck the .22 WMR down to smaller calibers, such as .20 (5 mm) and .17 (4.5 mm) or even smaller, in an attempt to get maximum velocity and the flattest possible trajectory. An example of such an experimental design is the Swedish 4.5×26mm MKR.


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