In the opening scene, when the Clayton gang rides into Crane City to rob the bank, there's a barn to the right of the bank with the sign 'JC McCormick, Blacksmithing, Wagon Repairing' with a large wagon wheel in the center. Later in the movie, when Lewis describes his past to young Johnny, there's a flashback scene to Abilene. Outside the Abilene Gambling Hall, right across the street, there's a barn with the same sign!
When Johnny plays horseshoes he leaves his throw short. He walks up to the shoe and kicks it onto the stake. There is a second shoe to the left and short of the stake. Father John arrives and admonishes Johnny for cheating and throws a shoe himself getting a ringer. However, the other two shoes are no longer in the picture.
During the final showdown, Lewis shoots Sam Clayton's gun out of hand, then shoots it several more times while it is in the air. However, when Clayton's gun lands on the ground, it is undamaged.
When Johnny pushes the man from the bell tower, it is an obvious dummy falling to its doom.