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calibre
Introduction References & Edit History
Quick Facts
Also spelled:
Caliber
Related Topics:
bore
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calibre

firearms measurement
Also known as: caliber
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History

calibre, in firearms, unit of measure indicating the interior, or bore, diameter of a gun barrel and the diameter of the gun’s ammunition; or the length of a gun expressed in relation to its interior diameter (now used only of naval and coastal defense guns). See bore.