Rifle and handgun bores have rifling, but shotgun bores do not.
- A bullet fired from a rifle or handgun has a spiral spin that keeps it point-first in flight, increasing accuracy and distance. This is achieved by the rifling inside the barrel, from which the rifle got its name. The barrel is thick and has spiraling grooves cut or pressed into the bore. The ridges of metal between the grooves are called lands. Together, the grooves and lands make up the “rifling.”
- The bore of the shotgun barrel is smooth because rifling would spread the shot pattern too soon.