The .41 Special—also commonly known as .41 Spl, .41 Spc, or 10.4x29mmR —is a wildcat (non-standardized) cartridge designed for revolvers, made to be a less powerful variant of the established .41 Remington Magnum. The cartridge was intended for police work, security and personal defense, using a 200 grain bullet at 900 feet per second. While proposed as early as 1955, it remains a niche, custom cartridge.