122 mm FRAG-HE OF-462

can vary but is usually a cast TNT/Amatol mixture weighing 3.46 kg; other fillings can include TNT only, with weights usually varying around the 3.5 kg mark. If a PD fuze is fitted it is usually the RGM-2 with selectable instantaneous or delay features and with a muzzle safety distance of between 5 and 7 m. 122 mm Howitzer M1938 ( M-30 ) ammunition uses a 'multisection' system of propelling charges. The total weight of the nitrocellulose powder charges is 2.2 kg, made up from a system of nine bags. The basic charge, Charge 8, is a single-base charge bag. This charge system produces a range of muzzle velocities ranging from 205 m/s at the lower end (minimum range 5,350 m) up to the 515 m/s (maximum range 11,800 m) produced by the Full Charge. When the OF-462 is fired from the 122 mm Howitzer D-30 or self-propelled 2S1 , a longer MK-75 brass or lacquered steel cartridge case (length 447 mm, weight (steel) 3.66 kg) with a base-mounted KV-4 percussion primer is involved. This can contain 12/1 Tr and 12/7 nitrocellulose powder in a 'Reduced Charge' form containing five variable charge bags weighing a total of 2.43 kg, or a single prepacked Full Charge weighing 3.8 kg. The muzzle velocity using the Full Charge is 680 to 690 m/s and the maximum range 17,360 m. The maximum muzzle velocity using the 'Reduced Charge' cartridge is 565 m/s and maximum range 15,300 m. Two training rounds intended specially for training towed 122 mm M-30 or D-30 and 2S1 self-propelled howitzer crews are the 122 mm VOFT-463 (for the M-30 ) and VOFT5 (for the D-30 and 2S1 ) training rounds, both using the same 122 mm HE-T OFT-462 projectile.