Jeff, would it help if I told you that of those 20, I can remember at least a dozen that I actually drew and anchored on?

There sure is a hell of a distance between seeing them and putting them on the ground, but I can't even tell you how many of those I had w/in 5 yards of my tree, at some point during the encounter. Or even had them hang around w/in 15 yards of my tree for 5 minutes or longer. I can remember a few that hung around for over an hour.
Now, I don't know. I just thought of something else it teaches me too. MAYBE I'm not spending enough time glassing and really scouring the woods. Maybe there are deer, and maybe even some mature bucks, that are passing by a hundred yards away that I'm not seeing. And, maybe if they were, and maybe if I were to see them, I could change up my ambush point a little......