|Place of origin||Nazi Germany|
|Used by||West German Police|
|Bullet diameter||9.01 mm (0.355 in)|
|Case length||18.288 mm (0.7200 in)|
|Primer type||Berdan or Boxer small pistol|
|Source(s): guns.ru - Ammunition for submachine guns and handguns|
The 9×18mm Ultra is a German pistol cartridge.
It was originally developed in the 1936 for use by the Luftwaffe, but was not adopted at that time. In the 1972–1973 time frame, Walther introduced the Walther PP Super chambered in the cartridge for the West German Police. It might have been influenced by a relative success of Soviet 9×18mm Makarov, being an intermediate round between 9×17mm and 9×19mm Parabellum, fit for simple blowback pistols. The Walther PP Super was discontinued in 1979. The cartridge was made available to the civilian market in 1975. It did not gain lasting popularity however.
The 9×18mm Ultra (.355-inch caliber) is not interchangeable with the 9×18mm Makarov (.365-inch caliber), as the latter uses a larger diameter bullet.
- Frank C. Barnes (2012). Richard A. Mann, ed. Cartridges of the World: A Complete Illustrated Reference for More Than 1,500 Cartridges. Gun Digest Books. p. 338. ISBN 1440230595.
- Erenfeicht, Leszek (2018) (in Polish). From Russia with Love. Pistolet Makarowa. „Strzał.pl” No. 6/2018. III (19), p. 25-26. ISSN 2451-4942
- "Modern Firearms - Walther PP Super". World.guns.ru. Archived from the original on 2010-09-02. Retrieved 2012-11-07.
- Downey, Jim (2 May 2012). "Gun Review: Mauser HSc-80: A decent gun except for the 9mm Ultra cartridge". Guns.com. Retrieved 17 September 2016.