The round is used with the 5 cm Pak 38 (anti-tank gun) and has an overall length of 19.5 inches. The conical head of the projectile, protruding from the neck of the brass-coated case, is painted black. The weight of the complete round is approximately 6 lb. The same shot is used in the 5 cm Kw.K. (tank gun) with the 11.3 inch case (6317 St), length of round 14.3 inches and the electric primer C/22, also with the 5 cm Kw.K. 39 (tank gun) with the 16.5 inch case (6330 St), length of round 19.5 inches, and the electric primer C/22.

The shot is of the same construction as 4.7 cm type described in Pamphlet No. 4, page 20 and Fig. 12, but has a reinforced cap of thin sheet steel over the head of the plastic ballistic cap. The reinforcing cap is made up in two layers and extends about half-way down the plastic cap. A hole is drilled in the base of the body, presumably for the escape of air when the core is inserted.

The weight of the shot, without the tracer, is 1 lb. 14 oz. The core weighs 11 oz. 12 dr. and has a hardness figure varying between 1430 and 1690.

The steel case coated with brass, is 16.5 inches in length, has a shoulder at 13.5 inches from the base and is necked. The shot is fixed in the neck of the case, where it is secu-red by indenting of the case into the lower flange of the shot body. Only the conical head of the shot is exposed.

The propellant charge, indicated by marking to weigh approximately 1 lb. 8 oz. 14 dr., is made up of tubular cords which are green in colour. The propellant consists basically of nitrocellulose and diethylene glycol dinitrate.

The igniter consists of a flat circular silk bag containing propellant consisting of 88.1 per cent nitrocellulose with camphor.

The C/12 percussion primer is described in Pamphlet No. 4.