What is .22 br?

The .22 BR (Benchrest) is a centerfire rifle cartridge developed for use in benchrest shooting competitions. The cartridge is a necked-down version of the .308 Winchester, with a case that is 1.5 inches long.

The .22 BR is popular among benchrest shooters due to its high accuracy, low recoil, and ability to shoot flat trajectories at long ranges. It is also used for varmint hunting and plinking.

The bullet diameter for the .22 BR is .224 inches, and the maximum pressure is 55,000 psi. The cartridge is typically loaded with bullets weighing between 50 and 55 grains, providing a muzzle velocity of around 3,000 feet per second.

The .22 BR is not a common cartridge, and ammunition can be difficult to find. However, it can be made by handloading cases from .308 Winchester brass and using a set of .224 caliber dies to re-size the neck.