Check out pg. 39 of the '07 catalog. It has all the reticle subtensions there, and elsewhere also in the catalog. That is one of the big advantages of the Nikons--their excellent Reticle Specifications section of their catalog.
I also use reticles for rangefinding, and that reticle has reticle-rangefinding written all over it. Any of the stadia points along the vertical axis (and the 2 horizontal axis points) could easily be applied for reticle rangefinding according to this on-line article--
www.ottllc.com/specialtypistols/sp20.pdfItem C) Reticle-Rangefinding--Ballistic reticle rangefinding
The system is based on a modification of the mil-ranging formula, and here's a link to a discussion concerning just that subject not too long ago right on this site--
http://www.gboreloaded.com/forums/index.php/topic,124744.0.htmlThe circles themselves would be difficult to apply for rangefinding (at the scope's highest power) for anything much larger than a pr. dog's width when the subtension is only 1.5 IPHY inside diameter , but would be excellent for that particular application (the stadia to stadia subtension between circles could easily be applied for rangefinding by using the "modified mil-ranging formula" as detailed in the above references). The pr. dog rangefinding would be quick to apply as a backup to the laser, and would be accurate to around 400-500 yds. often enuf to make it worthwhile to calculate. It would sometimes net a 1st shot connection at very long-range, is always better than guessing, and will always save ammo trying to walk them in when simply guessing range. With practice it would be very quick to apply.