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