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9×20mmSR Browning Long
Type	Semi-automatic pistol
Place of origin	Belgium
Production history
Designer	John Moses Browning
Designed	1903
Manufacturer	Fabrique Nationale de Herstal
Produced	1903–1940s or 1950s
Specifications
Case type	Semi-rimmed, straight
Bullet diameter	.3578 in max. (9.09 mm max.)
Land diameter	.3512 in nom. (8.92 mm max.)
Neck diameter	.379 in nom. (9.68 mm max.)
Base diameter	.380 in nom. (9.72 mm max.)
Rim diameter	.402 in (10.2 mm)
Rim thickness	.0492 in (1.25 mm)
Case length	.795 in (20.2 mm)
Overall length	1.10 in (28 mm)
Primer type	Small pistol
Ballistic performance
Bullet mass/type Velocity Energy 110 gr (7 g) FMJ 1,000 ft/s (300 m/s) 240 ft⋅lbf (330 J) 108 gr (7 g) FMJ 1,150 ft/s (350 m/s) 316 ft⋅lbf (428 J)
Source(s): Rifles and Machine Guns Prvi Partizan

The 9mm Browning Long, also known as the 9×20mmSR, is a military centerfire pistol cartridge developed in 1903 for the FN Model 1903 adopted by Belgium, France, Estonia, the Netherlands, and Sweden.

Description

9mm Browning Long is similar to 9×19mm Parabellum, but has a slightly longer casing and is semi-rimmed; the cartridge headspaces on the rim. The cartridge was developed by FN to be used in the blowback-operated Model 1903, a pistol designed using the same Browning patent as the Colt 1903. Using a more powerful cartridge, such as the 9×19mm Parabellum, would have required a locked-breech design. Ammunition was produced in Belgium, France, England, Sweden 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.

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

Prvi Partizan in Serbia manufactures 9mm Browning Long ammunition. The Prvi full metal jacket bullet weighs 7 grams (108 gr.) with a muzzle velocity of 350 metres (1,150 ft) per second. It is also currently manufactured by Mechanical and Chemical Industry Corporation of Ankara.

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

• Powder: 4.5 gr (0.29 g) N340
• Bullet: 110 gr (7.1 g) Norma J
• Length: 1.09 in (2.8 cm)
• Velocity: 815 ft/s (248 m/s)

See also

• List of handgun cartridges

References

1. 9X20 browning long. Modern Firearms. (n.d.). https://modernfirearms.net/en/cartridge/9x20-browning-long/
2. Boos, N. (n.d.). 9mm browning long (9X20MM) ammo. Southern Defense. https://southerndefense.com/handgun-ammo/9mm-browning-long-9x20mm/
3. ^ "C.I.P. TDCC datasheet 9 mm Browning long" (PDF). CIP. September 23, 2008.
4. Melvin, M., Capt., USMCR. Rifles and Machine Guns, p.385. New York,: William Morrow & Company, 1944.
5. Prvi Partizan
6. Janson, O. "Browning pistol M1903 becomes Swedish Pistol m/1907"
7. Janson, O. "Equipment, holsters and ammunition for m/1907"
8. Wilson, R. K. Textbook of Automatic Pistols, pp.237–238. Plantersville, S.C.: Small Arms Technical Publishing Company, 1943.
9. "9mm Browning Long". prvi partizan. Retrieved 31 October 2023.
10. 9mm Browning Long loading data at Gun Loads website
11. "Ladeboken web site". Archived from the original on 2020-10-28. Retrieved 2010-08-15.

• Military cartridges
• Pistol and rifle cartridges