125 mm FRAG-HE(FS) 3OF19 and 3OF26

the gun muzzle (overall fin span is 356 mm). There are two copper driving bands spaced 77 mm apart. The front band is 13 mm wide, with the rear band 7 mm wide. The explosive fillings vary. The 3OF19 contains 3.1485 kg of TNT while the 3OF26 contains 3.14 kg of A-IX-2 (RDX/Aluminium/Wax) surrounded by preformed steel fragments. The OF-19 projectile uses a nose-mounted point impact fuze known as the V-429E and made of steel, threaded into a steel nose adaptor. The prefragmented multipurpose and anti-helicopter 3OF26 FRAG-HE round fitted with an MTSQ fuze weighs 33 kg complete, with the OF-26 projectile weighing 23.2 kg. On detonation, the projectile creates between 600 and 2,000 fragments. After firing, a steel stub case weighing 3.4 kg remains to be automatically ejected, although manual ejection may be employed. The case, made of BW 11 steel, is 140 mm long with the flange diameter being 171.9 mm. The muzzle velocity of both projectiles is 850 m/s. Maximum range is 9,400 m for the 3OF19 and 12,200 m for the 3OF26. It is claimed that all these types of round have a service life of up to three years in a tank gun autoloader. Normal shelf life under controlled conditions is of the order of 10 years. A training round intended specially for training tank crews is the 125 mm VOFT22 training round with an OFT-19 HE-T projectile. The projectile is fired at a muzzle velocity of 850 m/s with a No 1 tracer element burning for up to 3 seconds from a location in the base so that the trajectory can be followed for training assessment and marking purposes.