Sounds like some nice setups guys. Got a buddy who uses an AR-10 243/87 V-Max combination and doin very well to 800 yds. with that setup.
SScoyote, that rifle looks waaay familiar! Did Lee Mosher of Insight Shooting Systems make it? If he did, and it looks like his build, that is an awesome rig! I know, I have some of his and they ALL shoot incredibly well!
6.5 Grendel with a 22" JP Enterprises for my LR gas gun. Mostly used for long range target shooting, and it does exceptionally well at that. More than half of the 4K+ rounds through it have been at 1000+ yards
http://youtu.be/36XhNfFKmEs