the 1895 Winchester in Dersu Uzala, even if it was an anachronism.
Anybody seen a Bisley Colt in a movie?
Or a Colt New Service?
IIRC, Richard Farnsworth used a Bisley in "The Grey Fox", and Lee Marvin had either a New Service or an Colt's Army Special in "The Professionals".
In "Ride the High Country" bad guy Warren Oates was armed with a Model 8 Remington rifle.