What type of barrels do shotguns have?

Shotguns typically have smooth bore barrels, which means the inside of the barrel is smooth and does not have any rifling. This design is intentional because shotguns are commonly used to fire shot shells that disperse multiple small projectiles (shot) rather than a single bullet. The smooth bore allows for a wider spread of these projectiles, making it easier to hit moving targets, especially in hunting and sport shooting situations.

In contrast, rifled barrels, which have grooves that impart a spin to a bullet, are more common in rifles to enhance accuracy over long distances. Hexagonal bore and brass lined barrels are not standard designs for shotguns and do not align with traditional shotgun manufacturing practices. Thus, the smooth bore design is essential for the effective use of shot and contributes to the versatility of shotguns in various shooting scenarios.