Somewhere around here I have a book with a picture of "a working cowboy's rig", a single-action Colt in a holster. The Colt has no trigger and is described as being either fanned or thumbed - neither of which sounds like a real aid to accuracy.
on the contrary , a man running slip gun was more than likely a pistolero and not a common cowpuncher
Elmer Keith experimented extensively with slip guns
