This will probably be as heavy as I go in my collection not the easiest to move around 73 pounds pretty heavy for a shell. I am very happy to add this ball to my collection. Does anyone know if these were used against troops or just fortifications and iron clads? These Dahlgren guns were used in coastal fortifications as well on ships. I did read they were considered obsolete by the end of the 2nd year of the civil war they had progressed to bigger Dahlgren guns. I can't imagine trying to add a 15 inch shell to the collection.