23×152mmB

23×152mmB
File:Ammo_23mm_cannon.jpg 23×152mmB ammo (BZT and OZ)
Type	Autocannon
Place of origin	Soviet Union
Service history
Used by	USSR, CIS, various former Eastern bloc 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)
Ballistic performance Bullet weight/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

The 23×152mmB is a large-caliber cartridge used by the USSR/CIS in the VYa-23 aircraft autocannon the Ilyushin Il-2 ground attack aircraft and in the 2A7 and 2A14 autocannons on the ZU-23-2 anti-aircraft gun series and ZSU-23-4 "Shilka", among others. Note that the ammunition for the VYa-23 uses a brass case and is not functionally interchangeable with the steel-cased ammunition of the modern ZU-23 anti-aircraft gun 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 the 30×165mm, it is still in service with the Russian Naval Infantry and 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 the Baher anti-material rifle chambered for this round. The stated purpose is to take down helicopters and vehicles.

See also

• 23×115mm, used mainly in aircraft weapons such as bomber defense guns and fighter aircraft