Instead of firing normal shot, cannon crew can opt to fire grapeshot using the following profile:

Firing Grapeshot

To fire grapeshot, select a target according to the normal rules for shooting. With the target chosen, roll an artillery dice and a D6 to find out how many shots are fired. If the artillery dice result is a misfire, roll a D6 on the Blackpowder War Machine Misfire chart to find out what has gone wrong.

Assuming that a misfire did not occur, roll to hit the target with a number of shots equal to the number rolled on the artillery dice plus the D6, resolving any successful hits using the grapeshot profile.