9×23mm Steyr [1]
Steyr Hahn M1912 show with 9×23mm Steyr ammunition on stripper clips.
Type Pistol
Place of origin 22x20px Austria-Hungary
Service history
Used by Austro-Hungarian Army
Production history
Designer OEWG
Produced 1911
Case type Rimless, straight
Bullet diameter 9.03 mm (Bad rounding hereScript error in)
Neck diameter 9.62 mm (Bad rounding hereScript error in)
Base diameter 9.70 mm (Bad rounding hereScript error in)
Rim diameter 9.70 mm (Bad rounding hereScript error in)
Rim thickness 1.25 mm (Bad rounding hereScript error in)
Case length 23.20 mm (Bad rounding hereScript error in)
Overall length 32.99 mm (Bad rounding hereScript error in)
Primer type Small pistol
Ballistic performance
Bullet weight/type Velocity Energy
115 gr (Bad rounding hereScript error g) FMJ1,025 ft/s (Bad rounding hereScript error m/s)268 ft·lbf (Bad rounding hereScript error J)
115 gr (Bad rounding hereScript error g) FMJ1,080 ft/s (Bad rounding hereScript error m/s)298 ft·lbf (Bad rounding hereScript error J)
115 gr (Bad rounding hereScript error g) FMJ1,230 ft/s (Bad rounding hereScript error m/s)388 ft·lbf (Bad rounding hereScript error J)
Test barrel length: 128 mm (Script error in)
Source(s): 1. Hornady; 2. Fiocchi; 3. Hirtenberger

The 9mm Steyr is a centerfire pistol cartridge originally developed for the Steyr M1912 military pistol. The cartridge headspaces on the mouth of the case. This was the service ammunition for Austria-Hungary during World War I and remained the service ammunition for Austria and Romania between the World Wars.[2] It is similar to the 9×23mm Largo cartridge in performance, but their dimensions, while also similar, are just different enough to make them non-interchangeable.[3] The cartridge performance is close to that of the .38 ACP. It is unrelated to the modern 9×23mm Winchester.

File:9x23mm Steyr.jpg


  1. Script error
  2. *Wilson, R. K. Textbook of Automatic Pistols, p.235. Plantersville, SC: Small Arms Technical Publishing Company, 1943.
  3. Script error

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