This cartridge is used with the 7.62 cm Pak 36 anti-tank gun. The overall length of the complete round is approximately 36.7 inches and it weighs 19 lb. 9 1/2 oz. The shot is painted black and stencilled in red except the white letters "KPS" denoting that the driv-ing band is iron covered with copper. The cartridge case is stamped in the base "6340 St. 7,5 cm Pak 40" and apparently is a converted case. The complete round for the 7.62 Pak 36 may, however, be readily identified by the white tip 1.58 inches long on the bal-listic cap.

APBC Shot with T.C. core

Tracer

Brass Case or steel case coated with brass

Propellant charge

Percussion primer C/12 n.A. St.

The Shot with its ballistic cap is 9.45 inches in length and, without tracer, weighs 8 lb. 10 oz. The steel body is a machined forging, and that portion of the cavity surface form-ing a housing for the plastic is coarsely machined probably to make a good bond with the plastic. It is screwthreaded in the base to receive a core holder and externally at the shoulder to receive a ring adapter securing the ballistic cap. The base is recessed to form a cannelure when the core holder is assembled.

The single driving band is of soft iron with a coating of copper. A cannelure for the at-tachment of the case is formed in rear of the dirving band.

The core holder is of of steel, and is bored centrally in two diameters to form a dia-phragm separating two recesses. The forward recess receives the tungsten carbide core whilst that in the base is screwthreaded to receive the tracer. The diaphragm is bored centrally to allow the air to escape when the core is inserted. Externally at the forward end, the holder is tapered and roughly machined similar to the cavity surface of the shell body and presumbly for the same purpose.

The head of the core and its holder are surrounded by moulded plastic which fills the space between the body and these components. The plastic has an ogival head of low crh. under the ballistic cap.

A reinforcing washer stamping from cold rolled mild steel strip, approximately 0.12 inches thick, is inserted in the plastic to seat on the forward end of the core holder and sur-rounded the core at about its shoulder.

The ballistic cap is pressed from mild steel sheet and is crimped into a cannelure in a mild steel adapting ring which screws on to the shoulder of the shell body.

Fig. 11

The case is of steel coated with brass and is 28.1 inches in length. The base is stamped with the model number "6340 St." This model number is also stamped on the 7.5 cm Pak 40 cases, described in Pamphlet No. 7, pages 50 and 52, which are only 26.2 inches in length.

The propellant charge weighs approximately 4 lb. 9 oz. and consists of grey tubular Gudol sticks 24.5 inches in length with a mean internal and external diameter of 0.193 inches and 0.076 inches respectively. An analysis of the propellant shows that it consists of nitrocellulose 36.48 per cent., diethylene-glycol-dinitrate 28.20 per cent, nitroguanidine 34.05 per cent, potassium sulphate 1.16 per cent and graphite 0.11 per cent. It is con-tained in a knitted fabric bag with an igniter in a stitched pocket at one end. The bag is stencilled in red "Für Tropen" and in black "7,62 cm Pak 36 2,070 kg. Gu.R.P. –A0.5 – (625 x 5/2).

The igniter consists of 20 grams Nz.Man.N.P. in the form of chopped cord. It consists of nitrocellulose 86.67 per cent, diethylene-glycol-dinitrate 9.53 per cent, diphenylamine 0.42 per cent, ethly centralite 0.83 per cent, graphite 0.70 per cent, potassium sulphate 0.25 per cent and camphor 1.60 per cent.

A flash reducer consisting of 1 oz. 2 dr. of potassium sulphate in a ring shaped fabric bag is added to the charge.

The percussion primer C/12 n.A. is described in Pamphlet No. 4, page 10.