That's the problem with messy questions they raise things that get in the way of what you are looking to have answered.
The OPs question is actually three questions in one. First part; "How accurate are you with a snubby revolver shooting double action and out to what range". There is a poll on that question.
Second part posed by the scenario; "Would you take a head shot?"
Third part which is implied and invited by the second; "Would you and should you take a head shot, or any other shot, da or sa in a gunfight?"
All of which is why folks are offering opinions on head shots, da vs. sa in a fight etc.
Messy question.
So let's ask it another way: You and Paris Hilton are lost in the woods. Three days nothing to eat but pine cones and grubs. A nice young 80 pd. pig steps out of the brush 20 yards away. You have your snub and 2 bullets. Paris or the hog?
Actually this is a messy question too, darn it.
tipoc