Gun/ammunition caliber to milimeters

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Brother-Captain Gaius
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Gun/ammunition caliber to milimeters

Post by Brother-Captain Gaius »

Is there a formula for caliber -> millimeters?
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Sea Skimmer
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Post by Sea Skimmer »

1 caliber is .254mm
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Brother-Captain Gaius
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Post by Brother-Captain Gaius »

Sea Skimmer wrote:1 caliber is .254mm
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Sea Skimmer
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Post by Sea Skimmer »

Remember though, once you get above 1 inch, caliber no long is a measurement of bore diameter but rather barrel length relative to the bore. Thus a 12 inch 30cal gun would have a 30 foot long barrel.
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Post by Slartibartfast »

Also there are exceptions, for example a .38 bullet is actually .357 inches.
And a .357 is also .357 inches.
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