Which unit describes bore size and cartridge size?

Which unit describes bore size and cartridge size?

• A. Caliber
• B. Gauge
• C. Diameter
• D. Weight

Answer: (A)

Caliber is the measurement used to describe both the bore size of a gun and the size of its cartridge. The bore size is the internal diameter of the barrel, and the cartridge size refers to the diameter of the bullet and the corresponding case that fits the firearm. Caliber is usually listed as inches (like .308) or millimeters (like 9 mm). This is the standard way we match ammunition to a firearm and ensure safe, effective shooting. Gauge is a shotgun-specific system and doesn’t apply to rifles or handguns; diameter is a general term, not a standard unit; weight refers to how heavy the bullet is, not the bore or cartridge size.

Caliber is the measurement used to describe both the bore size of a gun and the size of its cartridge. The bore size is the internal diameter of the barrel, and the cartridge size refers to the diameter of the bullet and the corresponding case that fits the firearm. Caliber is usually listed as inches (like .308) or millimeters (like 9 mm). This is the standard way we match ammunition to a firearm and ensure safe, effective shooting. Gauge is a shotgun-specific system and doesn’t apply to rifles or handguns; diameter is a general term, not a standard unit; weight refers to how heavy the bullet is, not the bore or cartridge size.