Can't say about the South, but it was commonly done in Europe.
"Bronze bells were the largest metal objects cast at the time (15 -16th centuries) - some weighed several tons. ......bells and guns exchanged form with each other frequently over the centuries. During war, a city's conqueror invariably claimed it's bells, melted them, and reshaped them into guns..... In 1508 Michelangelo melted a great bell captured in Bologna to cast a statue of Pope Julius II. The Duke of Ferrara, known as Il Bombardiere, got hold of the sculpture three years later and destroyed it to cast a massive cannon he named 'Giulia'."
- from 'Gunpowder' by Jack Kelly
Bronze is an amazing alloy....developed before iron but very hard and still used for critical applications. How those ancient people figured out how to alloy copper and arsenic or tin we'll never know. I'd love to have a bronze knife.
"Bronze was still used during the Iron Age, for example officers in the Roman army had bronze sword while foot soldiers had iron..." -wikipedia