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Definition
| The interior of a firearm barrel. |
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| The rear part of a firearm barrel. |
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| The diameter of the fore of a rifled firearm, usually expressed in hundredths of an inch or millimeters - for example, .22 caliber & 9mm. |
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| An interior constriction placed at or near the muzzle end of a shotgun's barrel to control shot dispersion. |
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| The process of determining the distance between the firearm and a target, usually based on the distribution of powder patterns or the spread of a shot pattern. |
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| The mechanism in a firearm that throws the cartridge or fired case from the firearm. |
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| The mechanism ina firearm by which a cartridge or fired case is withdrawn from the chamber. |
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| A discipline mainly concerned with determining whether a bullet or cartridge was fired by a particular weapon. |
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| Size designation of a shotgun, originally the number of lead balls with the same diameter as the barrel that would make a pound. The only exception is the .410 shotgun, in which bore size is 0.41 inch. |
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| A chemical test used to develop patterns of gunpowder residues around bullet holes. |
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Definition
| The cut or low-lying portions between the lands in a rifled bore. |
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Definition
| The raised portion between the grooves in a rifled bore. |
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Definition
| The spiral grooves formed in the bore of a firearm barrel that impart spin to the projectile when it is fired. |
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