Thanks for the welcome and reply Mervyn. There was a small WWII era base nearby, but from what I've heard did not have any guns this large. Perhaps practice off the coast. This area did have a lot of ship building from the 1600's through the 1800's. There were also many shipwrecks in the area from storms, rocks, fog and shifting shoals. We had quite a bit of discussion on whether it might be solid or not. There was material stuck to the end and I was a bit wary as to trying to clean it off to see if it might have been hollow.