I have one original that has a swamped barrel. However, the swamp is not as pronounced as the barrels today. I also have a late percussion brass mounted rifles in my shop that came from the middle TN area that has a big swamp profile in its 45 inch barrel. I have seen two rifles made by this maker. I use both straight and swamped with my builds. Most request I get today is for swamped barrels.
Roger Sells