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 29.3 inches and the weight 24.8 lb. The shell with its penetrative and small ballistic capis painted black, and is the same as that described for the 7.5 cm Pak 40 in this pamphlet. The necked cartridge case is 19.4 in-ches 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 Trop. P.T. + 25° C,

The propellant is in the form of tubular cords 14.6 inches and 16.5 inches in length. These lengths are indicated in millimeters by the figures "370" and "420" marked on the bag and case. The external and internal diameter of the tube are 0.152 – 0.053 inches. The double base propellant consists basically of 59.81 per cent of nitrocellulose (nitrogen content 11.7 per cent) and 27.07 per cent diethylene-glycoldinitrate, and includes cen-tralite, potassium sulphate, graphite and a waxy material. The weight of the charge as indicated by the markings for a charge temperature of 25° C is 4lb. 12 oz. 2 dr.

The igniter filling is in the form of chopped cord which is porous and green in colour. The composition as found by analysis consists of: 93.10 per cent of nitrocellulose (nitrogen content 13.2 per cent), 0.65 per cent of diphenylamine and 0.7 per cent of potassium sulphate. Graphite and oily material are also included. The weight of the igniter filling is 315 grains.