23×152mmB

The23×152mmBis a large-caliber cartridge used by theUSSR/CISin theVYa-23aircraftautocannontheIlyushin Il-2ground attack aircraftand in the2A7and2A14autocannonson theZU-23-2anti-aircraftgun series andZSU-23-4 "Shilka",among others.

23×152mmB
23×152mmB API (left) and HEI (right)
Type	Autocannon
Place of origin	Soviet Union
Service history
Used by	Historically: USSR,Warsaw Pact Contemporarily: second-, and third-world countries
Production history
Designed	1941
Specifications
Case type	Belted, bottlenecked
Bullet diameter	23 mm (0.91 in)
Neck diameter	23.7 mm (0.93 in)
Shoulder diameter	31.3 mm (1.23 in)
Base diameter	33.2 mm (1.31 in)
Rim diameter	34.6 mm (1.36 in)
Rim thickness	33.4 mm (1.31 in)
Case length	151 mm (5.9 in)
Overall length	235.6 mm (9.28 in)
Maximum pressure	2925 kgf/cm2
Ballistic performance
Bullet mass/type Velocity Energy 190 g (2,932 gr) BZ API 980 m/s (3,200 ft/s) 88,917 J (65,582 ft⋅lbf)
Test barrel length: 2008mm

Note that the ammunition for theVYa-23uses a brass case and is not functionally interchangeable with the steel-cased ammunition of the modernZU-23anti-aircraftgun series. These two weapons use different headspace sizes, therefore requiring ammunition of slightly different dimensions. While it is no longer in use in the main anti-aircraft weapons of modern Russia, being replaced by the30×165mm,it is still in service with theRussian Naval Infantryand many other countries.

Specifications

Dimensions:	23×152mm Belted
Muzzle Velocity:	970-980 m/s (from 2A7 & 2A14) 3182-3215 fps
Bullet Weight:	184–190 grams
Bullet Types:	OZ/OFZ (HEI), OZT/OFZT (HEI-T), BZ/BZT (API/API-T)
Weapon Systems:	Volkov-Yartsev VYa-23,2A7,2A10,2A14.
Applications:	ZU-23,ZSU-23-4 "Shilka",BMP-23,BTR-94,others.
Energy:	~88916.64 J (estimated) ~65581.54 ft lbs (estimated)

Iran has produced theBaher anti-material riflechambered for this round. The stated purpose is to take down helicopters and vehicles.

See also

• 23×115mm,used mainly in aircraft weapons such asbomberdefense guns andfighter aircraft