It's a 60/62 caliber smoothbore, Fusil de Chasse. Never measured it exactly. It came from Veteran Arms or one of those such places, not really sure. I got it from a reenactor at Martins Station. However, it has a good lock and it shoots shot very well. Never shot ball in it. I got it just for squirrel hunting and I don't have to worry about scratching it. I like to think it's something similar to what my ancestors in East Tennessee and southeast Kentucky may have carried in 18th century. I may get some pictures of it and my homemade accoutrements sometime and post in a new thread.