The attached image came from my wife's grandparent's house. One of their grandparents was in the Indiana 7th Infantry; I saw the enlistment and discharge papers circa 1861. I've done a little research, but I believe this to be a canister shot from a 9 or 12 pounder artillery piece. It's too big to be grapeshot, it's about 1.5 inches in diameter and about a pound. It's smooth all the way around, which tends to indicate it's Union not Confederate. Trying to confirm what I have here...