10mm Auto, also known as 10mm Norma, is a cartridge developed by Norma Projektilfabrik AB and introduced in 1983. It was designed as a more powerful alternative to the 9x19mm Parabellum, offering improved performance in terms of penetration and stopping power.
The 10mm Auto has been adopted by a number of law enforcement and military organizations around the world, including the Federal Bureau of Investigation (FBI) and the United States Army Special Forces. It is also a popular choice for self-defense among civilians.