5 mm Remington Rimfire Magnum

The 5 mm Remington Rimfire Magnum is an obsolete bottlenecked rimfire cartridge introduced by Remington Arms Company in 1970. Remington chambered it in a pair of bolt-action rifles, the Model 591 and Model 592, but unfortunately the round never became very popular, and the rifles were discontinued in 1974. The ammo discontinued in 1982. About 52,000 rifles were sold during its brief production run. As of 2008, Aguila, a Mexican ammunition company, is producing 5mm Remington Magnum ammunition.

Design
Remington designed a new case that was very similar to the older .22 Mag, but stronger to handle the higher pressure of the 5 mm at 33,000 PSI. It uses a 5mm (.20 caliber) bullet that measure 0.2045 in, the same as the more recent .204 Ruger cartridge.

For a brief time, Thompson Center Arms offered firearms in 5 mm Mag. From 1982 until 2008, no ammunition manufacturers manufactured rounds for this cartridge, but some firearms manufacturers are creating conversion kits to allow the existing 5 mm guns to shoot other more-common cartridges.

At the 2008 SHOT show, Taurus International introduced the first handgun chambered for the 5mm Remington Magnum rimfire. Concurrent with the announcement from Taurus, Aguila Ammunition announced they would begin producing 5mm RMR ammunition in 2008.

Performance
The 5 mm Mag offered higher velocity than the .22 WMR and more energy than either the .22 WMR or the later .17 HMR. They offered decent performance on small-game and for varmint hunting.

Categories
Cartridge:rifles