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 BeltedMuzzle Velocity: 970-980 m/s (from 2A7 & 2A14) 3182-3215 fps Bullet Weight:184–190 gramsBullet 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
References