What does bore mean in firearms?

Bore: The inside of the barrel. “Smoothbore” weapons (typically shotguns) have no rifling. Most handguns and rifles have “rifling”. Brass: A slang term sometimes used for fired cartridge cases.

What is a rifles bore measured in?

Caliber
Caliber is used to describe the size of a rifle or handgun bore and the size of cartridges designed for different bores. Caliber usually is measured as the diameter of the bore from land to opposite land and is expressed in hundredths of an inch, thousandths of an inch, or millimeters.

What do they call it if the diameter of the barrel of a shotgun is the same throughout the bore?

Gauge is determined by the number of lead balls of size equal to the approximate diameter of the bore that it takes to weigh one pound. For example, it would take 12 lead balls with the same diameter as a 12-gauge shotgun bore to weigh one pound.

Are shotgun barrels tapered?

Some shotgun bores are tapered from forcing cone to muzzle, often in several distinct stages. Immediately in front of the chamber is the forcing cone that centers the shot charge or slug in the bore. While the bores of smoothbore shotgun barrels may be polished, they are not lapped or air-gauged.

What is a bull barrel on a pistol?

In rifles, it’s generally a barrel that doesn’t taper towards the muzzle. In pistols, bull barrel refers to barrels that are a thicker diameter than the factory barrel, or even that flare towards the muzzle. We also refer to flared barrels as conical barrels.

What is difference between bore and caliber?

bore, in weaponry, the interior of the barrel of a gun or firearm. In guns that have rifled barrels, e.g., rifles, pistols, machine guns, and artillery or naval guns, the diameter of the bore is termed the calibre.

Does a pistol bore use a choke?

Chokes are most commonly seen on shotguns, but are also used on some rifles, pistols, or even airguns. Chokes may also be formed even after a barrel is manufactured by increasing the diameter of the bore inside a barrel, creating what is called a “jug choke”, or by installing screw-in chokes within a barrel.

Is bore the same as diameter?

In a piston engine, the bore (or cylinder bore) is the diameter of each cylinder. The stroke ratio, determined by dividing the bore by the stroke, traditionally indicated whether an engine was designed for power at high engine speeds (rpm) or torque at lower engine speeds.

What does tapered barrel mean?

A squeeze bore, alternatively taper-bore, cone barrel or conical barrel, is a weapon where the internal barrel diameter progressively decreases towards the muzzle resulting in a reduced final internal diameter.