Dear Bernard
I think this article will be of interest to you. One thing often said is a Rifle is slow to load but this article on Patrick Fergurson (of Kings Mountain fame) and his Breech Loading Rifle puts paid to that. He could fire 7 Rounds per minute. Howe was not a fan of his though and had it stopped. Though Clinton was a fan of his and brought him back
Geraint
https://allthingsliberty.com/2018/12/patrick-ferguson-and-his-rifle/