Howdy all,
I think much of this argument can be addressed by looking at the character you assume. Much like the thoughtful question OCB posed in another post. My character is the Hon. Col. W. F. Cody in the time period I portray (58 years old). Most of the clothing, leather, firearms, etc. I use was most likely not commonly available or in use by the working cowboy. By the time Cody was my age he seldom carried a sidearm except in the arena. It was in use however by show folks or people of means, or those who thought they were of means, wished to present the image of such, or were formerly of means. If your character would have had access to the clothing, firearms, leather, etc., then us 'em. If not, then don't. Just my opinion. Take care.