Below is a list of rimmed cartridges (R). Although similar, it must be noted that rimmed cartridges differ from rimfire cartridges (list). A rimmed cartridge is a cartridge with a rim, whose primer is located in the center of the case head; the primer is detonated by the firing pin striking that center location. A rimfire cartridge also has a rim, but the primer is located around the rim; the primer is detonated by striking the rim.[1]