What benefit do you see in having your revolver unloaded?
I’ve been interested in this subject area for quite some time. Not once have I ever heard of a home defense strategy that involves an unloaded weapon. You would get laughed right out of several discussion groups that specialize in this subject (http://www.thehighroad.org/ or http://www.thefiringline.com/ for example).
Also, you are grossly misunderstanding the meaning of NRA Gun Safety Rule #3. What this is referring to is a weapon that has been brought out (to be cleaned, to be transported to a firing range, to be shown to a friend, etc.) In all of those cases, yes, you want to immediately engage the safety, drop the magazine, rack the slide, and ensure that the weapon is completely unloaded.
In the case of a home defense weapon, it’s considered to be “in use”. It’s not being stored. You are using it for the purpose of home defense. It must be in a useable state (not unloaded or excessively locked up).
Because that is how I was trained starting at around age 10 when I got my first gun. We have children coming into our house often (wife teaches piano), and even though all my guns are locked up and not even where they are apparently visible, I don't want to take a chance with other people's children who may not ever have been around one and know how to handle it. That is the only one where I even keep the ammunition even close to my gun, the others are in a cabinet safe with the ammunition locked in a separate safe drawer below it. I don't care what 'discussion' board may laugh, this is my choice of responsibility based on the situation I am in. I wonder if those discussion boards would laugh at someone keeping a loaded gun under their pillow ala hollywood.