Shot-garland

Half of it would be distributed fairly evenly along the ship in the shot-garlands; where he decided to stow the other ten tons would make all the difference to Atropos, could add a knot to her speed or reduce it by a knot, could make her stiff in a breeze or crank, handy or awkward under sail.

Source: wiktionary

Note however the triangular shot-garlands for storing shot between each gun, and the two ringbolts inboard of each gun fastened to the binding-strakes.

Source: wiktionary

Next came the shot: once removed from the shot-garland and handed to the loader, he "put it home" or "rammed it home," seating the shot against the wadding.

Source: wiktionary