I've tried just about all the ball powders that will work in the 223. I use the 223 strictly for varmints and rarely use bullets over 55 grains, with the 50 grain VMax being what I use most. My most accurate load in a bolt rifle has been with surplus WC846. Extremely consistent on the chronograph, and very accurate as well. With my AR's, I like H335, BL-C2, W748....all old school, I know.....also TAC, X-Terminator, H322, WC844, plus a few of the AA powders.