Bought this months Handloader Magizine . It came with a "AR-Tactical "Loads hand out. It says 27.5grs of W-W 748 will produce 3,160 FPS out of a 20" BBL AR-15 I just bought 2lbs of Varget and loaded 26.2grs of Varget behind Sierra 65gr GK fired out of my AR-15 20" BBL produced 2,861 FPS with a nice 3/4 MOA group at 100 yds. Any how that's a 200 fps difference between the two powders. Any one have any experience with W-W748 shooting heavy bullets and getting high velocity like Hand out claims ? Trying to develop e 300 yde Coyote load out of my AR-15 .