I was finally able to shoot a few test loads today. Here is what I got.
From the Sierra service rifle data for .223, test barrel 20" colt AR, 1:7 twist, H335 powder, 69 gr. Matchking.
Today's conditions:
temp = 18*F wind chill 1*F
Wind 90* left @19 mph with gusts.
Distance 100 yds.
Published...