Ingwe - "Yep and I saw another John Wayne Movie- I forget the title- set in post Civil War 1866-1867
the Duke was packing a '73 Colt SAA and a model '92 Winchester..."
The great director John Ford, and actor John Wayne, never bothered to pay much attention to the proper firearms for the period in which their flicks were supposed to take place. Just use whatever "Duke" wanted, and whatever worked best with the five-in-one blanks.
L.W.