| 摘要 |
The present invention shows an improved 9mm cartridge casing having greater strength and reliability. This cartridge casing is a substantially hollow cylinder of a suitable metallic material with a length of about nine hundred thousandths of an inch (0.900 in.). The casing is unique in that its external dimensions include a first end portion having an outer diameter of about three hundred ninety-eight thousandths of an inch (0.398 in.). The casing also has an opposite end portion extending for the remaining length of said casing, with an outer wall which uniformly decreases in diameter from about a diameter of from about three hundred ninety-eight thousandths of an inch (0.398 in.) to a diameter of about three hundred eighty thousandths of an inch (0.380 in.).
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