Manufacturing Metallic Cartridges
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Manufacturing Metallic Cartridges
Manufacturing Metallic Cartridges




      

Manufacturing Metallic Cartridges


Manufacturing Metallic Cartridges

Manufacture—Sheet metal of the required thickness, from .025 inch to .09 inch, is used for the various kinds of cartridges. This is fed to a double acting die and punch, which cuts out a disk and forms it into a cylindrical cup at one operation. The cup is reduced to a cylinder of the required length in from four to six operations by dies and punches, and is called drawing or reducing. The cylindrical shell is trimmed to a standard length in a machine called the case-trimmer. After washing, the shells or cases have a flange formed at the closed end by pressure in a special machine called the header.

The headed case is tapered to a standard size. The open end is made cylindrical for the length the bullet enters it, so as to enclose the latter snugly; and if it be inside-primed, like the present service cup-anvil cartridge, the anvil is inserted and fastened at the same time by crimping the case around its edge.

Farrow, Edward S. American Small Arms; a Veritable Encyclopedia of Knowledge for Sportsmen and Military Men. New York: Bradford, 1904. Print.

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