It's really sort of an education. U sort of have to understand the "lingo" as well as the system itself. If u tell a guy that your gun is capable of shooting 10" groups at a thousand yds. that tells him just a small bit of info. But if u say that the gun is capable of 1 minute out to 1000, then he understands that that's ~1" at 100, 2 at 200, 3 @ 300, etc. If your spotter tells u you're a "minute" right at 565 yds. u don't have to think, well OK that's 5.9", but dang how many clicks is that at 565 yds...? Crap, where's my calculator? U can just dial another 4 clicks (for .25 MOA clicks) quickly on the scope turret.
It's kind of an education in angles really. U start to work with words like subtension, interpolation, minute of angle (MOA), Shooter's MOA (SMOA), inch per hundred yds. (IPHY) mil, milliradian, mil-relation theory, etc.
It's fun...IMO. Sort of opens a new door to shooting some don't know even exists.
Once u start playing with this stuff, u'll never look at a turret or reticle the same way again. Instead of just an aiming point/points in the FOV u'll start thinking of them as optical measuring devices.
Jeez Don, u're purty close to one fo the big names in the long-range business, Darrell Holland. He's right up there in Powers, OR. Puts on a L-R shooting school and comp.
www.hollandguns.com