Continuity mistake: In the scene with the horse trainer, the character has a wedding ring on, then doesn't, then does, and finally doesn't again. (00:30:40 - 00:32:50)
Continuity mistake: As Raylan sits down opposite the thug, who says "I just take orders", his gun is held vertically. Cut to a shot from the front and it's on its side. (00:25:00)