The fixed Q.F. round is used with the 7.5 cm anti-tank gun, model 40. The overall length is 37.36 inches and the weight 20.25 lb. The shell is fitted with a fuze of the A.Z. 23 type, and is painted a deep olive green. The numeral "13" is stencilled in black above the shoulder of the shell and indicates a bursting charge of amatol 40/60. The base of the case is stamped with the model number "6340 St." and with the dimension "Pak 44 Rh", but the side of the case is stencilled "7,5 cm Pak 40".

H.E. shell filled amatol 40/60 with smoke box.

Fuze kl.A.Z. 23.

Gaine, gr.Zdlg. C/98.

Propellant charge of double base composition with igniter.

Case of steel, coated with brass, model 6340 St.

Primer percussion, model C/12 n.A. St.

The shell, filled and fuzed, weighs 12.8 lb. The driving band may be of the copper cover-ed iron type, or may be wholly of iron. A cannelure is formed behind the driving band for the attachment of the case. The wall of the shell is tapered, being thicker towards the base than towards the head, thus increasing the capacity for the bursting charge. A fuze-hole bush is screwed in at the nose to take the fuze. The bush is fitted with an ex-ploder container.

The method of filling design is the same as that for the 7.5 cm H.E. shell described on page 32 and shown in Pamphlet No. 4 (Fig. 21), where details of the smoke box (Rauch-entwickler No. 8) and the gaine are included. The weight of the filling is 1 lb. 6 oz. 12 dr.

The kl.A.Z. 23, small type of the model 23 fuze, is similar in construction and action to the A.Z. 23 decribed in Pamphlet No. 1, Section 4.

The 1 lb. 11 1/2 oz. charge is contained in an artifical silk bag with an igniter sewn at the base, and is similar to that for the 5 cm cartridge described in Pamphlet No. 4, pages 9 and 10, i.e., the bag containing flake propellant with a long central tubular stick of pro-pellant which protrudes through the choked neck of the bag and reaches almost to the base of the shell. An annular bag containing potassium sulphate is secured at the choke of the cartridge bag and a ring pushed down over the neck of the bag keeps the flake propellant towards the base of the case. The flake propellant is of the "Gu.Bl.P. –AO– (4 x 4 x 0,6) varity, which consists of diethylene-glycoldinitrate, nitroguanidine and ni-trocellulose. The dimensions of the flake ar 0.16 x 0.16 x 0.02 inches. Details of the tu-bular propellant and the igniter composition are not yet available.

The cartridge bag is marked "7,5 cm Pak 40, 780 g, Gu.Bl.P. –AO– (4 x 4 x 0.6)".

These are the same as those described for the A.P.C.B.C. cartridge in this pamphlet.