This is the current Russian military cartridge used in the Makarov and Stechkin auto pistols. It was adopted shortly after the end of World War II, and its design was probably inspired by an experimental German cartridge called the 9mm Ultra. This cartridge is intermediate in size and power, between the .380 Automatic and the 9mm Parabellum. It is a well-designed cartridge for its purpose, although a little underpowered by Western standards.
