As some people are steering you towards 44/40, I will put in my 2 cents worth.
I have an original Winchester 73 in 44/40, Winchester never made a rifle in 45 colt.
It was made in 1882, I had it relined and some new springs put in. I've shot probably
a couple thousand rounds through it. It's as smooth as silk, and works perfect. So I
have about the same or less money than a Italian repro, that is going to have to be
slicked up before you use it. And finally if cowboy shooting slowly fades away, what is
going to be the wiser investment, an original that has never went down in price or a
repro that there are thousands to be sold. Rock Island auction sells a lot of originals
and parts (if needed) are available off ebay. Just my opinion, I love shooting mine with
real black and it's 139 years old (The Real Deal)
BTB