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Ammunition for 100 mm T-12 and MT-12 anti-tank

Region
Bulgaria
Category
Ammunition, Missiles and precision weapons
The Ammunition for 100 mm T-12 and MT-12 anti-tank is all 100 mm T-12/MT-12 rounds are fixed, with the projectiles rigidly secured to the lacquered steel cartridge cases. In general terms the projectiles differ from other similar 100 mm projectiles, by their ability to be fired from smoothbore barrels. The cartridge cases also have a revised outline with a pronounced neck two-thirds of the way up from the base, thereby indicating the development from the 115 mm calibre. There are four main types of anti-armour
projectile: the guided Kastet; an APFSDS-T; a HEAT-T; and a HE-FS. The T-12/MT-12 can fire the 3UBK10 and UBK10M Kastet gun-launched guided missile round with a projectile virtually identical to the 9M117 projectile, intended for rifled 100 mm and 115 mm guns (qv). The 9M117 was originally developed for use with the T-12/MT-12 anti-tank guns and is part of the 9K116 Bastion system. The Kastet is fired towards its intended target by the normal gun crew but once in flight the projectile is guided by an operator located close to the gun and using a 9S53 laser target designator. This enables the gun crew to engage another target immediately after the Kastet has been fired. The maximum range is 4,000 m and minimum range 100 m. Weight of a complete 3UBK10M round is 27.5 kg. Time of flight to 4,000 m is 13.5 seconds. The APFSDS-T, also referred to as a HVAPFSDS-T, has the designation 3UBM10 and fires the 3BM-24 projectile assembly weighing 4.55 kg. The projectile assembly is essentially similar to that employed with the 100 mm UBM-8 APFSDS-T round, fired from D-10 series tank guns. The cartridge case contains 8.75 kg of propellant. With a muzzle velocity of 1,548 m/s the 3BM-24 can penetrate 406 mm of armour set at an angle of 0º at 500 m and 225 mm at 1,000 m. Maximum effective range has been estimated at 2,000 m. The fin-stabilised HEAT-T has the designation 3UBK-8 and has the 3BK-16M projectile weighing 9.5 kg with a shaped warhead using A-IX-1 (RDX/Wax) explosive initiated by a GPV-2 PIBD fuze. The cartridge case contains 4.69 kg of propellant which produces a muzzle velocity of 1,075 m/s.