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Bore

image of the bore of a gun
closeup of the bore of a gun

The bore is the interior of the barrel of a firearm. In guns that have rifled barrels, including rifles and pistols, the diameter of the bore determines the caliber — or the outside diameter — of the bullets loaded into the ammunition for a particular firearm.

The information contained on this website is provided as a service to USCCA, Inc. members and the concealed carry community, and does not constitute legal advice. We make no claims, representations, warranties, promises or guarantees as to the accuracy, completeness or adequacy of the information disclosed. 

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