The .41 Special Ammo, also known as the .41 Spl Ammo, is a wildcat nonstandardized cartridge that was designed for revolvers. This bullet was designed so that it can be a less powerful variant of the existing .41 Remington Magnum. The primary intention behind the .41 Special Ammo was to use the 200-grain bullet variant for police work and personal self-defense. The .41 Special Ammo was first proposed to be created as an analog to the .44 Special Ammo, but the idea never gained any ground. The idea of the .41 Special Ammo was proposed again in the early 1960s and was to be based on the already adopted .41 Magnum Cartridge. The idea was solidified and acted upon this time, but the .41 Special Ammo didn't last long in the market. However, in the 1980s, the concept of firing a 200-grain bullet at 900 feet per second was revived.
The .41 Special Ammo originated in the United States in 1963 for the first time and was revived by pistolsmith Hamilton Bowen in the 1980s.
The primary usage of the .41 Special Ammo is self-defense, thanks to the bullet's perfectly matched velocity and power.