Measuring between what surfaces constitutes correct barrel length?

Measuring between what surfaces constitutes correct barrel length?

• A. The distance from the breech face to the crown.
• B. The distance from the muzzle to the grip.
• C. The distance from the chamber to the muzzle.
• D. The distance from the throat to the muzzle.

Answer: (A)

Barrel length is defined by the distance from the breech face—the rear surface of the chamber where the cartridge sits—to the crown, the end of the rifled bore at the muzzle. This measures the actual length of the part of the barrel that influences the bullet as it’s accelerated and spun by the rifling. It provides a consistent reference point across firearms and stays true even if a muzzle device is added. Measuring from the muzzle to the grip would reflect overall length or external dimensions, not the rifled portion. From the chamber to the muzzle starts at the chamber area and doesn’t specifically reference the rear of the bore, leading to inconsistency. From the throat to the muzzle omits part of the rifled bore near the breech, giving an inaccurate representation of the barrel’s true length.

Barrel length is defined by the distance from the breech face—the rear surface of the chamber where the cartridge sits—to the crown, the end of the rifled bore at the muzzle. This measures the actual length of the part of the barrel that influences the bullet as it’s accelerated and spun by the rifling. It provides a consistent reference point across firearms and stays true even if a muzzle device is added.

Measuring from the muzzle to the grip would reflect overall length or external dimensions, not the rifled portion. From the chamber to the muzzle starts at the chamber area and doesn’t specifically reference the rear of the bore, leading to inconsistency. From the throat to the muzzle omits part of the rifled bore near the breech, giving an inaccurate representation of the barrel’s true length.