Through my years of collecting, I've occasionally run across U.S. Coastal Artillery rounds. In all of the pubs I have, the only Coastal info I have is on larger caliber weapons. I've never been able to find info on the smaller calibers, 1pdr, 3pdr, 6pdr, 12pdr and 15pdr. My latest find looks to be a 12-15pdr Common shell without a fuze (came in a steel MK II M2 B1 3" casing), and no fuze I have, Naval or Army, fits it. Does anyone out there have any info on the smaller caliber Coastal weapons or ammo? Thanks, Bruce.