This fixed Q.F. round is used with the 7.5 cm tank gun, model 40, and the 7,5 cm assault gun, model 40. The overall length of the round is 30.6 inches and the weight is approxi-mately 20 lb. The shell is fitted with the kl.A.Z. 23 fuze and painted a dark olive green with the numeral "13" stencilled in black above the shoulder. This shell is the same as that described for the 7.5 cm Pak 40 in this pamphlet. The necked cartridge case is 19.4 inches long and is fitted with the electric primer, C/22. The model number of the case "6339 St." and the designation of the tank equipment, "7,5 cm Kw.K. 40" are stamped in the base of the case.

The propellant charge is contained in an artifical silk bag which bears the markings "Für Tropen P.T. + 25° C, 7,5 cm Stu.K. 40, 7,5 cm Kw.K. 40, 745 g, Gu.Bl.P. –AO– (4 x 4 x 0,6)". The weight of the charge as indicated by the markings is 1 lb. 10 oz. 4 dr.

The charge consists of square graphited flake and a large stick of multi-tubular propellant which protrudes from the choked neck of the bag an reaches almost to the base of the shell. A small circular annular bag, marked "20 g K₂SO₄", is fitted over the tubular propel-lant at the neck of the main bag. The annular bag contains 278 grains of potassium sul-phate.

The dimensions of the flake propellant are 0.156 x 0.156 x 0.025 inches. The composition includes nitrocellulose, diethylene-glycol-dinitrate, nitroguanidine and graphite. The stick of multi-tubular propellant is black and has a diameter of 0.554 inch with a cross-web section and four quadrant hole. The web measures 0.042 inch. The propellant is of the double base type; details of the composition are not yet available.

The igniter formed at the base of the main charge bag contains 335 grains of nitrocellu-lose powder in the form of chopped cord. The powder is porous and is greyish-green in colour.