No, but I can easily see how with a single action revolver where you have to spin the entire cylinder past the oading gate to look how one could miss that one live primer. And I can see fake live primers being used too. I remember in movies like Saving Private Ryan I always noticed that the rounds in the machine gun belts didn’t have primers.
I don't mean to be picking on you, JoeBob, but they've been making movies with guns for a long time now. Don't you think they have had time to evolve some pretty strict safety procedures? You could do things like put blaze orange pieces of plastic in flashholes for dummies or orange plastic cases for instances where you wanted to show bullets through the front of a cylinder, etc. It would be easy for a prop man to line up a cylinder so that the next cocking brings up the correct round.
This stuff isn't difficult and is well understood. Any actor/actress that doesn't understand this could be trained on it in a half hour or less.
There's no excuse why the actor can't be the last link in a chain of quality/safety control.
