Nikon offer's a number of choices that will meet your need. Plus, if you want to save some $ Nikon has their MONARCH 3 4-16 mildot reticle on sale for $60 off which puts it near $400.
Check out the link below for all their current long range specials. You might want to check out this site's Sponsor's to see if they can help you with your purchase too. If you have any question's drop me a note. Are you using Spot On to shoot your BDC retiucle scope?

http://www.nikonpromo.com/long-range-precision-1-16.php