Howdy
I always get a kick out of that bit about how the mounted soldier was supposed to be able to reload a Schofield with one hand while keeping one hand on the reins. Unloading is fine, you open the latch with your thumb and break the gun open by shoving the barrel against your leg, dumping all the empties in the process. But I'll be consarned if I know how a mounted trooper could keep the reins in one hand, hold the gun with another, and pop cartridges into the cylinder at the same time. Maybe a really good rider could hold the pistol with the same hand that held the reins while the other hand reloaded. Not me, I ain't that good a rider that I would even try if the horse was trotting or galloping. Maybe that's just me.
Regarding the American Model, the Russian Model, the Schofield Model, the New Model Number Three, and the Double Action 44, just remember, they were all built on the #3 frame. All Schofields are #3s, but not all #3s are Schofields. And it was not like today when all N frames and all K frames are almost identical. In Top Break days, #3 denoted the size of the frame, but there were distinct differences in all five of the #3 models, as can be seen on the page I referred to.