New on here, and thought I'd ask about some accuracy questions. I have a Colt AR-15 which looks very similiar to the A2 with a 20" bbl 1:7 twist. My goal was to create a precision tool, just for the simple fact that I enjoy the AR system and 223 rnd. Look at the pics from before and after. So I installed a free float tube, recoil eliminator, and now plan on reloading with 77 grain sierra hpbt matchking bullets (is moly coated better?), Alliant RE-15 24.1 grn, with remington 7-1/2 primers. Has anyone had any expierence with loading the 77 grn? How about replacing the two stage 8lb trigger? any thoughts appreciated.