U may be able to call the company too to get that information. My Leupold Varmint Hunters reticle is also like that...a "tree reticle" system, that is, as well as several others i use. The 450-yd. trajectory of this rig/load hits the VH reticle at 2.8 vertical units below X. and the 10 mph wind calcs out at only 60% of the factory 10 mph windage subtension for the line stadia above the vertical zero for that range. My entry on my dope sticker would look like this--450-2.8-.6. See how it works? As far as i can tell this is the most accurate system of application for BDC-type reticles if using them at the optic's highest power--
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