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| HANDBOOK OF ENEMY AMMUNITION |
| PAMPHLET No. 4 |
| GERMAN, ITALIAN AND JAPANESE SHELLS, FUZES AND SMALL ARMS AMMUNITION |
| GERMAN CARTRIDGE, Q.F., A.P. SHOT 3.7 cm (ARROW-HEAD) |
| (3,7 cm Pak. Pzgr. 40) |
| (Fig. 14) |
| This round is fired by the 3.7 cm anti-tank gun. |
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The projectile of this fixed Q.F. round consists of a 15 mm A.P. cemented carbide core contained in a cylindrical mild steel body which is fitted with a conical ballistic cap and provided with a tracer filling. The weight of the A.P. core is 2297 grains. |
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The body has a front and rear flange formed on it. The forward side of the front flange is sloped to conform with the ballistic cap which is screwed into it. The rear flange has a circumferential groove which, in conjunction with a step formed on the front flange, ap-parently is used for the attachment of the projectile to the case on assembly. A tracer cavity, closed by a celluloid disc, is formed in the base of the body. |
| The ballistic cap is of aluminium alloy and contains a pressed paper tip. |
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The body is of free cutting mild steel with a higher sulphur content and the weight of the complete projectile is 5500 grains. |
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The cartridge case is rimmed and made of steel, coated on both sides with brass, and contains a propellant in the form of dark green tubes of the following dimensions: Length 18.45 cm, external diameter 2.5 mm, internal diameter 1.15 mm. The approximate com-position of the propellant is: – |
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Nitrocellulose |
58 per cent. |
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Ethyl centralite |
2.5 per cent. |
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Ash |
0.5 per cent. |
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Nitrogylcerine |
39 per cent. |
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100 per cent. |
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The case also contains an igniter in the form of a silk bag containing chopped cylinders of ungraphited nitrocellulose powder stabilized with diphenylamine. The chopped cylinders are approximately 1.15 cm in length and 0.95 mm in diameter. The weight of the igniter filling is 1.83 grams. |
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