9×23mm Steyr

9×23mm Steyr [1]
Type	Pistol
Place of origin	Austria-Hungary
Service history
Used by	Austro-Hungarian Army
Production history
Designer	OEWG
Produced	1911
Specifications
Case type	Rimless, straight
Bullet diameter	9.03 mm (0.356 in)
Neck diameter	9.62 mm (0.379 in)
Base diameter	9.70 mm (0.382 in)
Rim diameter	9.70 mm (0.382 in)
Rim thickness	1.25 mm (0.049 in)
Case length	23.20 mm (0.913 in)
Overall length	32.99 mm (1.299 in)
Primer type	Small pistol
Ballistic performance
Bullet weight/type Velocity Energy 115 gr (7 g) FMJ 1,025 ft/s (312 m/s) 268 ft·lbf (363 J) 115 gr (7 g) FMJ 1,080 ft/s (330 m/s) 298 ft·lbf (404 J) 115 gr (7 g) FMJ 1,230 ft/s (370 m/s) 388 ft·lbf (526 J)
Test barrel length: 128 mm (5.0 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 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.

Steyr Hahn M1912 show with 9×23mm Steyr ammunition on stripper clips.

References

1. ↑ "9mm Largo vs. Others". Retrieved 2009-07-10. 
2. ↑
   • Wilson, R. K. Textbook of Automatic Pistols, p.235. Plantersville, SC: Small Arms Technical Publishing Company, 1943.
3. ↑ Jeff, John (August 2009). "Q&A". Guns Magazine. p. 35.