Peter Sherayko supplied the guns for Tombstone. I had an online discussion with Pete, and if I remember correctly, he used EMF Hartfords for all the "Colts", along with some real stuff that was rare and and was not at risk of being damaged.
One set of Curly Bill's is sitting in a display case at Spangenburg's Gun Shop at Tombstone. You can get close enough to see them pretty good and those were EMF Hartfords.
Diamond Jim, the owner of Spangenburg's, used to be a neighbor of mine, and told me that Powers Boothe did not want the set after the filming, and got them from Peter.
I had the opportunity to be a gunsmith for Spangenburg's, but had too many ties up here in the valley to be able to accept Diamond Jim's offer. Imagine that. Gunsmith, at probably the oldest and most famous gunshop in the West. At least I got the offer!
RRio