MK,
I've run the LR and just recently helped a neighbor obtain one, the very same 3-9x40 you mention. I feel you need to chrono your load, or at least know the factory velocity as well as the bullets BC. Then run it through a ballistic program ( such as JBM online) so you know your bullets drop in MOA. Then, look at either the booklet that comes with the scope or the online booklet (
http://www2.leupold.com/resources/downloads/2008_03_BAS_Engl.pdf ) and see what the drops are for the 1st, 2nd dots and top of the bottom picket. That will give you the distance at which the dots and picket match up to your bullets drop. For you, it will be on page 7 of the booklet.
For your scope at 9x the 1st dot will be a 2.19 MOA drop. 2nd dot at 4.8 MOA and 7.82 MOA drop for the top of the bottom picket.
Alan
