|23x115 mm cartridge|
|Place of origin||Soviet Union|
|Bullet diameter||23 mm (0.91 in)|
|Case length||115 mm (4.5 in)|
The 23x115 mm round is used by Soviet(USSR)/Russian/CIS aircraft autocannon, most notably by the GSh-23L and GSh-6-23. Although the round has been superseded by the 30x165 mm round, the Russian Air Force still uses it in the GSh-23L (in aircraft's tail turrets and in the UPK-23-250 gunpack/gunpod) and GSh-6-23 (used in Su-24). This round still serves in many countries and is widely available.
The round was derived from the 14.5×114mm round by necking it out to 23mm. The original rounds used a lower power charge of 33g of sw 4/7 powder and achieved only 690 m/s at a maximum pressure of 294,3MPa. In 1954 an improved ammunition was introduced, featuring better projectile design and ballistic properties. The newer rounds have a powder charge to achieve 720 m/s.
- Nudelman-Suranov NS-23, used in An-2, Il-10, Il-22, La-7, La-15, MiG-9, Yak-7, Yak-9U, Yak-15, Yak-17, and Yak-23 planes.
- Nudelman-Rikhter NR-23, used in MiG-15, La-15, MiG-17.
- Afanasev Makarov AM-23, used in Tu-16, Tu-95, Il-54 bombers, and An-8, An-12, Il-76 transports.
- Gryazev-Shipunov GSh-23, used in MiG-21, MiG-23, SOKO J-22 Orao, HAL Tejas, IAR 93 fighters, Tu-22M and Tu-95 bombers, W-3WA Sokół helicopter, Il-76 transport and in the UPK-23-250 gunpods.
- Gryazev-Shipunov GSh-6-23, used in Su-15, Su-24, MiG-31 and early versions of the MiG-27.
- 23x152 mm, one variant used in the VYa-23 on the Ilyushin Il-2 ground attack aircraft, and a different variant in the later Soviet anti-aircraft autocannon series (ZSU-23-4, ZU-23, etc.)
- An example of three 23mm NS/NR series cartridges
- Shirokorad, Aleksandr (1999). История авиационного вооружения. Минск: Харвест. pp. 135–137. ISBN 985-433-695-6. (Russian)
- Koll, Christian. "23x115 23mm NR/NS and GSh aircraft cannons". The Russian Ammunition Page. http://www.russianammo.org/Russian_Ammunition_Page_25mm.html#8. Retrieved 7-Dec-2012.
- Koll, Christian (2009). Soviet Cannon - A Comprehensive Study of Soviet Arms and Ammunition in Calibres 12.7mm to 57mm. Austria: Koll. p. 131. ISBN 978-3-200-01445-9. http://www.russianammo.org.
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