Rimmed cartridges are a type of ammunition characterized by a protruding rim at the base of the cartridge case. This rim helps to extract the cartridge from the chamber after firing, making it easier for the firearm to eject spent rounds. Rimmed cartridges are commonly used in revolvers and some rifles, providing reliable feeding and extraction. These cartridges are often found in older firearms and are popular in certain calibers, such as those used in revolvers and lever-action rifles. The design of rimmed cartridges can enhance the overall performance of the firearm, especially in terms of reliability during operation.