Rifle Scopes : Ranging Reticle on a cranking scope, Why?

Got a buddy who uses a 243 AR-10 for predators in the winters here. We make a pretty good long-rangin' team. I have the Leica BRF, and when the game is spotted he gets setup with his rig, and I start calling range to the critter. He sets up with the AR and applys his Leupold Varmint Hunter's reticle for ranges to about 600 or so, and dials for further distances (rarely). I can't tell you how many of those shots would not have been successful had he been dialing instead of subtensioning it.

Ever try to hit a badger at longer ranges? They're almost constantly moving it seems. Turrets would be very difficult to apply in a LR badger scenario.