What Is the Largest Caliber Rimfire?

Rimfire ammunition is a metallic firearm cartridge with a hollow rim sticking out of the base. Rifles and handguns use rimfire and are measured in caliber, which is the diameter of the barrel’s interior expressed in millimeters (10mm) or hundredths of an inch (.22 cal). The largest caliber rimfire is a .22 cal, which is … Read more