Factual error: The scene where Jon Wayne's Son is shooting the deer at 600 yards, he swings his rifle about 20-25 inches in about 2 seconds - by my calculations the deer must have been travelling around 250 mph.
Factual error: The semi-auto handgun is not a real Bergmann 1911. It is a Walther P-38 that was modified to look like a 1911 Bergmann, but when Michael shows it, he puts the magazine in the grip rather than in front of the trigger, as a Bergmann would require.
Continuity mistake: In the scene where John Wayne picks up the red box of money he lifts it onto his back and walks to an open door. As he goes out the door the camera moves to outside and we see John Wayne come out of the building. Now the red box is completely on his shoulder, rather than his back.
Jacob 'Big Jake' McCandles: I'll give you $500 now and another $500 when you get 'em to market.
Scottish Shepherd: That's highway robbery.
Jacob 'Big Jake' McCandles: Well, maybe you think you're gonna get a better offer for 'em today?
Scottish Shepherd: I'll take it... with one proviso.
Jacob 'Big Jake' McCandles: What's that?
Scottish Shepherd: I go with the sheep.