Like most Westerns out of Hollywood in those days, the writers played fast and loose with the facts of the day and times...
Typically the types of weapons used in the era they are shown using them in...
In particular to this movie, Cahill tells Pee Wee Simser that he recognized the sound of his old Spencer (Spencer repeating carbine) when he shot Cahill in the shoulder again...
But in the shootout, the rifle Simser was using was clearly a Henry Repeater lever action rifle (The prelude to the first few Winchester lever guns based on Henry's togle action bolt patton first used in the old Volcanic pistols in the late 1840s early 1850s...
Review of Cahill U.S. Marshal
