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| GERMAN EXPLOSIVE ORDNANCE - PROJECTILES AND PROJECTILE FUZES |
| CHAPTER 5 |
| GERMAN PROJECTILES |
| PERCUSSION PRIMER 42/M |
| EMPLOYMENT. Russian Primer from German 7.62 cm round (See fig. 322.) |
| DESCRIPTION: |
| 0.875 inch, over-all length. |
| 1.188 inches, diameter of lip. |
| 0.938 inch, diameter of body. |
| 0.375 inch, threaded length. |
| 0.094 inch, thickness of lip. |
| Number of threads, 5 RH. |
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CONSTRUCTION. The brass body of the primer houses a percussion cap which fits in the bas belong a brass anvil. The cap consits of: |
| 21 percent mercury fulminate. |
| 40.3 percent potassium chlorate. |
| 37.8 percent antimony sulphide. |
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The brass anvil is screwed into the primer body and houses a copper sealing cone. Through the center of the anvil and the sealing cone is a flash channel leading to a black-powder charge in the top of the primer. This 99-grain charge fills the whole upper recess of the primer and extented slightly below the upper end of the anvil. |
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The top of the primer is sealed by a brass closing ring and the whole primer, except the brass is coated with black varnish. |
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ACTION. The cap is forced against the anvil by the firing pin. The flash is then transmit-tet through the anvil igniting the black powder with this, in turn, fires the propelling charge. |
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