All rounds are clocked by a LabRadar. Charge weight for Reloader 15 with 70 gn has been 22.5, 23, 23.5, 24 grains. With Reloader 15 and 77 gn SMKs they are, 23, 23.5, 24.
No, none of anything I've loaded groups well. Well, that's not entirely true, I have had some 1 MOA groups, but even then...