From what I have seen of rounds penetrating body armor of the period, as well as the pictures in the referenced site, usually, if not always, the damage was done by artillery fire-either canister or round shot.
During the period grapeshot was not used by field artillery as it was not an efficient anti-personnel round. Canister was much better and did more damage. Further, artillery ammunition, including canister, was made of iron, while musket rounds were lead, a much 'softer' metal.
Grape shot was still used with heavy (siege, fortress, and garrison) artillery as well as by naval artillery, either in fortresses that protected naval bases or aboard ship.