1860-70's Intermediate Cartridge. 45-60 ? or other similar

I think more realistically at first would have been the spencer for infantry and then have a squad leader with a Winchester 1866. I saw this conversation too. The Winchester 1876 also came in 45-75 and other calibers. I have to wonder if we had the industrial capacity to make all that ammo? Also what are we going to do with all the muzzle loaders then?
 
Top