my dad told me the big thing to worry about finding in the 50s and 60s was blasting caps. all the I75 and other interstate projects going on at the timeIn the 1950's some folks found a cannon ball near Westview Cemetery, and took it home, they put it in a fire place to burn the rust and crud off it. It went off and killed one, this happened about 3 doors down from a friend of mine. I've found Minnie balls in my back field. GA is full of ordinance ..Just be careful with cannon balls ..