Military Wiki
9×20 mm Browning Long
9mm long cartridge.jpg
Type Semi-automatic pistol
Place of origin  Belgium
Production history
Designer John Moses Browning
Designed 1903
Manufacturer Fabrique Nationale de Herstal
Case type semi-rimmed, straight
Bullet diameter .356 in (9.0 mm)
Neck diameter .376 in (9.6 mm)
Base diameter .384 in (9.8 mm)
Rim diameter .404 in (10.3 mm)
Case length 20 mm (0.79 in)
Overall length 1.10 in (28 mm)
Primer type Small pistol
Ballistic performance
Bullet weight/type Velocity Energy
110 gr (7 g) FMJ 1,000 ft/s (300 m/s) 240 ft·lbf (330 J)
Source(s): Rifles and Machine Guns [1]

The 9×20 mm Browning Long is a military centerfire pistol cartridge developed in 1903 for the 9 mm Browning pistol adopted by Belgium, France, the Netherlands, and Sweden.[2] The cartridge headspaces on the rim. Ammunition was produced in Belgium, France, England, Sweden[3] and the United States. There was some production in Germany during World War I for the Ottoman Empire, and the cartridge was also used in South Africa.[4]

The cartridge is now obsolete and it is hard to find reloadable brass for this ammunition; one option handloaders have is to take the .38 ACP and shorten it to the right length.

There is reloading data available on a few websites[5] and in some handloading manuals, e.g. the Norwegian Ladeboken.[6]


  • Powder: 4.5 grains N340.
  • Bullet: 110 grains Norma JHP
  • Length: 1.09 in
  • Velocity: 815 ft/s (248) m/s

See also


  1. Melvin, M., Capt., USMCR. Rifles and Machine Guns, p.385. New York,: William Morrow & Company, 1944.
  2. Janson, O. "Browning pistol M1903 becomes Swedish Pistol m/1907"
  3. Janson, O. "Equipment, holsters and ammunition for m/1907"
  4. Wilson, R. K. Textbook of Automatic Pistols, pp.237–238. Plantersville, S.C.: Small Arms Technical Publishing Company, 1943.
  5. 9mm Browning Long loading data at Gun Loads web site
  6. Ladeboken web site

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