THANK YOU for pointing that out. I have heard that coment so many times, and it just isn't true when you look at what the prop is supposed to represent. When he shoots it in the movie, there is no revolution of a cylinder.
I was looking at a 4" Chiappa Rhino awhile ago, and the salesm said to me "Have you ever seen Bladerunner?" I responded "Yes I have." He responded "That gun looks just like the one Harrison Ford used in that movie!" All I could think was "Ummmm...... no it doesn't. Have YOU seen Blade Runner?" I was polite though, and just said thanks and left.
Anyway, back to it.