I've recently found some items detecting at a mid-1850s U.S. military camp, and I'm looking for help in identifying them as I don't know much about Civil War era relics. I've been told that the lead piece (1.5 cm in dia.) with the star is a shotgun slug, and if so, is it from the era? The second piece is similar in size to a 3-ring bullet. Thanks for the help - Andy