If you want a 30 caliber hunting round to shoot from an AR-15 look at the new Olympic 300 OSSM. It's just a 25 WSSM necked up to 30 cal, but it gives 308 Win performance.
It's still not a long range cartridge as 150 grains is about the max bullet weight because of the AR-15's short magazine. The only commercial AR currently on the market is I consier "Long Range" the 6.5 Creedmoor in a DPMS LR-65CM. It's good for medium game to 1000 yards . The 300 SAUM was good to over 1000 yards. but (I believe) now discontinued by DPMS and Armalite.
Heres' my 300 OSSM. The cartridges top to bottom are 300 OSSM, 6.5 Grendel, and 223 Rem.