Well, I will use "By the order of the great white queen", a rule set that is not on the open market. It's flexible enough for 1/1 ratio games. I used it with the Sudan campaign forces you saw and it worked well with larger units too.
It is one of many that are made by a group of students from my university time, now old grey historians that never will grow up fully. And still producing rules that are intended to be more "rivet counting" than most.
They have lists for all arms, not just rifle, pistol.... but with detailed data for the diverse rifles, carbines used in colonial conflicts. Gardner, Nordenfelt, Gatling versions, all have different effects.
Sounds complicated but they are very playable.


