I am looking to build or buy a new AR style rifle chambered in .308. Anyone have any suggestions on Manufacturer, Barel Length/Twist, Fluted or Bull, Etc.. I will be using it mostly for long range target/SHF practice with quick follow up shots and rapid adjustment changes in windage and yardage? I had a RRA Predator Pursuit 5.56/.223 with a 20"Bull, 1:8 twist that would drive tacks at 100yds with the right ammo (Even surplus 62gr "Green Tips" would hold decent 2" groups) But I wanted something with a little more range and knockdown power. Because of a childhood accident I cannot hold a rifle stock (unless thumb-holed) correctly enough to be very efficent so an M1 style rifle is out . I have been looking at RRA, DPMS, Armalite, Etc.. I have owned RRA in the past so I am kinda leaning that direction but the DPMS and Armalite SASS rifles look pretty sweet.. I just don't know enough about the .308 round/ballistics to make an educated guess when dropping $2,000 on a new rifle! Any suggestions??