The fixed Q.F. round is fired from the 47 mm 32 calibre anti-tank gun, model 35.

The complete round weighs 4.5 lb., and has an overall length of 11.8 inches. The shell is pale blue in colour, with a red head, a white band near the centre and a green band im-mediately above the driving band. The T.N.T. bursting charge is indicating by the sten-cilling "TRITOLO".

Armour piercing shell filled T.N.T.

Base fuze with tracer and gaine.

Brass cartridge case.

Propellant charge.

Percussion primer, model 35.

The shell is approximately 5.4 inches in length and weighs 3.2 lb. filled and fuzed. The body is machined from rolled bar steel and is hardened from the point to a position just above the copper driving band. The V.D.H. hardness figure varies from approximately 690 to 270. The shell is closed at the base by the fuze which is inserted with a lead washer in front of the flange at act as a gascheck.

The bursting charge consists of two pellets of pressed T.N.T. The forward pellet is sha-ped to fit the ogival head of the shell cavity and has a central cavity to receive the gaine fitted to the fuze. The second pellet is in the form of a hollow cylinder which fits round the forward part of the fuze. A felt washer is inserted between the base of this pellet and the fuze body. The weight of the bursting charge is 1 oz. 1 dr.

The fuze is of the graze type with an igniferous detonator, and is fitted with a 0.89 gram cyclonite gaine. A tracer filling is contained in the body at the base.

The fuze body is of steel, screw-threaded and flanged externally for insertion in the base of the shell. The diameter of the threaded portion is 1.21 inches and the pitch approxi-mately 2 mm. A lead washer is fitted in front of the flange to form a gascheck joint. The front face of the body is recessed and screw-threaded to receive the pellet holder.

The pellet holder may be of steel or aluminium, and consists of a hollow cylinder screw-threaded externally at the base end for insertion in the body and internally at the front end to receive the needle holder and gaine adapter. The pellet holder is closed at the base by an internal base cap of steel, which has a central projection carrying a lead disc. The projection and disc fit into a recess in the base of the graze pellet and thus lo-cate the pellet.

The cylindrical brass graze pellet is fitted with an igniferous detonator, and is held off the fixed needle by a creep spring and an arming sleeve. The detonator contains 0.9 grain of gunpowder primed with a 0.8 grain pressing of a flash producing detonating composition. The composition consists of: – Mercury fulminate 10.4 per cent, potassium chlorate 48.3 per cent, antimony sulphide  40.2 per cent, and grit 1.1 per cent. A slight shoulder is for-med near the front end of the pellet to support the arming sleeve.

The brass arming sleeve is held between the needle holder and the shoulder on the graze pellet and thus prevents the pellet moving towards the needle. The sleeve is split throughout its length to permit expansion during set-back.

The needle holder is screwed into the pellet holder above the arming sleeve, and consists of a screwed steel plug with four flash-holes and a central hole, into which the needle is screwed. The flash-hole are closed by a paper disc.

The 0.89 gram cyclonite gaine fitted to the front end of the pellet holder is described in this pamphlet in the section of Italian gaines. In this instance the outer cup contains a 2.2 gaine perforated pellet of gunpowder.

The tracer, which is fitted in the base of the fuze, and retained by a screwed steel sleeve with a translucent closing disc, consists of a brass cylinder which is open at both ends, and contains the tracing and priming compositions in the form of a pressed pellet. The tracing composition, weighing 32.4 grains, is pressed with drift which leaves a small conical cavity and consists of barium nitrate 61.5 per cent, magnesium 32.6 per cent, with boiled oil and zinc. The priming composition weighs 7.7 grains and is pressed in two increments. The first pressing is made with a serrated drift and the second with a flat drift. The composition consists of barium peroxide 74.1 per cent., magnesium 20.4 per cent, and includes barium carbonate.

On acceleration, the split arming sleeve sets back over the graze pellet and leaves the pellet held off the needle by the creep spring. On graze the pellet over-comes the resis-tance of the spring by its momentum and impinges the detonator on the needle. The flash produced by the detoantor passes through the flash-holes in the needle holder and the brass disc and ignites the powder pellet in the gaine. The flash from the powder pel-let initiates the lead azide/lead styphnate mixture, which in turn detonates the cyclonite filling.

The brass case is the same as that described for the H.E. round. The propellant charge has a weight of 6 oz. 4 dr. Details of the composition are not yet available. The percus-sion primer, model 35, is described in this pamphlet.