I wouldnt use the Noslers either. I'd also chitcan the 2520 idea. That powder produces erratic results/lack of consistent accuracy. If you want good speeds with AR Comp, you are going to have to run a real heavy load. Some guys have posted good velocities with it, but with way over book max listings. One powder I'd try, and have had good success with, is X-terminator. I get good velocity and decent accuracy with it.
