Continuity mistake: Heyes is shot from the right and falls from his horse, grazed on the right side of the head. When he's recovering, however, the wound has moved to the left side of his head. (00:13:00)
Continuity mistake: The rifle Curry slings to his saddle when he sets off after Jake disappears during his journey, then reappears just in time for him to use it in getting the drop on Jake. (00:42:40 - 00:44:25)