The 1803 Harper's Ferry rifle was, of course, rifled. This was the gun used by Louis and Clark's Corps of Discovery , but I don't know if it was ever issued to troops per se. I remember reading somewhere recently that either Lewis or Clark (don't remember which) may have actually carried a 1793 Springfield smoothbore musket instead. My earlier post was wrong. Apparently, Springfield was making copies of French muskets in the late 1700's. In any case, I don't know if any rifled flintlocks were ever issued to U.S. troops on a large scale. Maybe some of the other guys on the Forum will know. :thumbsup:
P.S. I don't think rifled arms really became popular for military use until the advent of the Minie Ball. I think rifles were considered too hard to load under combat conditions. The Minie was undersized and would load easily down a rifled bore. Upon firing, the skirt of the bullet would obturate or expand to fit the rifling. I read a book years ago called Rifleman Dodd by C.S. Forrester. The book is about a British infantryman during the Peninsular War (1808-1812). In this book, the main character carries a Baker rifle (.62 cal. rifled flintlock), and it describes him carrying a small mallet for hammering the ball down the rifled barrel :shocking:.
He used an undersized ball (which would defeat the purpose of the rifling) which would drop down the barrel until it became too fouled, at which point he'd start using the mallet. Forrester's books are usually very accurate as far as period military practices, so I wouldn't doubt that this was common practice for Brits armed with Baker's. I'd rather use a smoothbore! :shocking: :thumbsup: