Shot' describes all solid metal projectiles fired from a naval gun. It came in many forms, from round-shot (the normal cannonball) to 'langridge' which was metal scrap fired as shot. Bar shot and chain shot - two shot connected by a chain or a bar - was especially effective against spars and rigging. Grape-shot, an anti-personnel form, was 1 inch (2.5 cm) in diameter and was often used in carronades, short-range light guns usually mounted on upper decks. It was usually pre-packed, scattering as it left the gun muzzle.