Sorry but the first scoped rifle in the United States was during the Revolution. I've no proof it was used in combat, but the officer who ordered it knew nothing of cheek weld and had to have springs (spring loaded butt pad) installed to soften the recoil. Check out chapter 4 of my second book (it's also in the first book):
Yeah he also immediately invented "scope eye" right after and abandoned the project.
It wasn't until we had rifles capable of reliable long range accuracy that we get scopes to go with them. Before that there wasn't much point. The minnieball was the turning point I think.
Please explain your expertise and research that you did in the blackpowder era MTT TL? Lest one forgets, gasoline preceded the gasoline combustion engine. Stuff used to be discarded into rivers.