23 × 152B mm

this ammunition: HEI: Also known as HEFI. The projectile consists of a steel shell filled with AIX-2 explosive ignited by a PD MG-25 nose fuze. The projectile has a copper drive band. The steel case contains approximately 77 g of 5/7 CFL propellant in powder form ignited by a KV-3 primer to provide an initial muzzle velocity of 970 to 980 m/s. This provides an effective horizontal range of 2,500 m or 1,500 m in altitude. HEI-T: Also known as HEFI-T. As HEI but with tracer burning for at least 5 seconds. API-T: Solid steel projectile body with steel ballistic cap and tracer assembly in the base. The steel case contains approximately 76 g of 5/7 CFL propellant in powder form ignited by a KV-3 primer to provide an initial muzzle velocity of 970 to 980 m/s. The tracer burns for at least 5 seconds. The projectile can penetrate 10 mm of armour, assuming an impact angle of 30º and an impact velocity of 530 m/s. TP-T: As HEI-T but the projectile is filled with an inert mixture. Subcalibre AP-T: Intended for use with a subcalibre barrel insert intended for low-cost gunnery training. The round closely resembles that for the API-T but has a silver tip painted on the nose and the propellant charge is reduced to 73 g of 5/7 CFL propellant in powder form. The slightly reduced propellant charge in the brass or steel case results in a muzzle velocity of 910 m/s and the round weight is 447 g. Horizontal range is 1,800 m. Blank: This cartridge consists of the steel case only with the mouth crimped over. The contents are 35 g of VTJ powder ignited by a KV-3 primer.