I'm doing some research on the Wiggins Battery used during the Carolina's Campaign. It was described by Confederate Col. Dibrell as a two-gun battery located, at the time, outside Columbia, SC. Based on shell fragments, we are pretty sure at least one was a 3-inch ordinance rifle. Some speculate the other gun was a 12-pdr. Does it make sense that one battery would be made up of more than one type of gun?