Make sure to actually have it over an empty cylinder.
I was explaining to someone how to load an SAA:
Load, skip, load, load, load, load, pull the hammer back and drop the cylinder. I did the aforementioned while explaining that when I pull the trigger that nothing should happen. I took aim at the target and pulled the trigger. I figured why waste a good dry fire. Bang! Had I but looked I would have noticed that I messed things up, and adding an empty would make that more difficult to tell.
How could you have a slogan like "freedom is slavery" when the concept of freedom has been abolished?