How many cannon balls were fired at fort mchenry? how much did each weigh?

~1,500 to 1,800 cannonballs were launched at the fort, and damage was light due to recent fortification that had been completed prior to the battle.

~While relatively mobile compared to siege or naval guns, field artillery pieces were still incredibly heavy. A gun meant to fire only 10-pound projectiles could weigh well over half a ton.