When Lucas McCain's famous rifle falls in to the hands of one of Oat Jackford's henchmen while they are about to burn down the McCain house he accidentally discharges the rifle. He then discovers that the trigger on the lever action Winchester is rigged to fire on completion of the cycling of the lever. Later Lucas cycles the action a couple of times in his fancy spinning motion but the rifle does not discharge.
Lucas wore wrangler jeans that weren't introduced until 1947.
When Lucas describes the life of Job, he said Job had 7 sons & 7 daughters. He actually had 7 sons & 3 daughters.