I know which scope I'm going to use for my new rifle build (even have the 30MOA mount arriving early next week) and have been playing with the ballistics program to get a feel for bullet drop and windage adjustments. A little while ago I was talking to a friend about what range to zero and I noticed that the scope has stadia marks above the reference line. I got to thinking about using them to hold under for close in targets. As in zeroed for 100yds and then shooting at a 50yard target by using the third stadia mark above the reference line. Has anyone done this before? Does it work or is it another overly sober thought process?