My little brain is starting to hurt. Suppose I had a scope with mil dot reticle mounted on a .270 Winchester and went to the range and sighted it in 1.5"s high at 100 yards using the intersection of the main crosshairs as my aiming point. Then I fire groups using each mil dot as my aiming point onto a big target. I then measure to the center of each group and record how high it is at 100 yards and of course which dot I used. Then sit down with a ballistics calculator and plug in the numbers. For instance if the third dot down hit 8"s high at what range would the bullet again cross the line of sight, thus giving you a dead on hold for that dot at the given range. Does this make any sense? Of course you would have to use the same power setting each time so the relationship of the crosshairs to the target would be consistent. Am I just dumb? Does everybody already do this? I have a rangefinder so I don't really need the dots for that purpose. Will this hold water? Naturally you would need to shoot at the actual distances to gather "real data". But seems to me this would give you a good starting point? What do y'all think?