several old ships have been found in the river dating back to the times of the lumber barons of Michigan. I was using just foil wrapped charges of 600 grains. We had a topsail schooner and a replica sidewheeler loaded with Marines from the USS Michigan Marine Guard and a couple of secessh unit. I furnished the shore battery. With the traffic on the river live firing was a no-no but don't think the thought hadn't entered my mind. LOL.
ng