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Old 12-05-2012, 06:36 PM   #1
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Default cartridge designation?

What's the second number in the cartridge designation. Like 9x19 or 7.62x39 etc. Is the second number the bullet length or cartridge length?



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Old 12-05-2012, 06:48 PM   #2
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Mm in length for metrics.



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Old 12-05-2012, 06:51 PM   #3
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Enjoy:
http://en.wikipedia.org/wiki/Caliber#Cartridge_naming_conventions

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Old 12-05-2012, 07:59 PM   #4
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Bear in mind that the diameter is the NOMINAL diameter. A .22 Magnum is NOT the same diameter as a 22 LR. The 9mm Parabellum and 9mm Makarov or NOT same diameter. Sometimes the name itself is a bit screwy- .38 Specials are NOT .38 inches in diamter, etc.

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Old 12-06-2012, 10:02 PM   #5
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The second number is the case length.



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