I know this has probably been asked before, but I'm asking again. I have a Leupold 4X12x40 mm VX-2 scope. I'd like to upgrade to an adjustable sighting system, preferably target knobs or a BDC dial. I don't want a reticle system. My shots will mostly be limited to 600-800 yards maximum. I have looked at the Leupold BDC dial on their site. I think it will work on my model scope. If so, does the BDC system from Leupold work for moderate yardages? What other options do I have? I'd like to keep the scope, not only for economic reasons, but it has proven to be **** good glass. Thanks guys, mtmuley