Shotgun Bores Are Smooth
Why are some shotguns called smoothbores? The Rifle, Handgun, and Shotgun Bores drawing shows the inside of a shotgun barrel, which is smooth. Therefore, some shotguns are called smoothbores. Also, the shotgun barrel is thinner than a rifle barrel. The barrel looks like a piece of thin steel pipe. Shotguns usually shoot pellets, also called shot.