Just tapped into the last jug of AA2200, but mostly for 223 loads. According to the data I downloaded and printed, they're showing 21grs as a max for the triple deuce and 50gr bullets, but we know how them things go these days. ;O)
Haven't loaded a 222 round in years, but am overdue fer it and there's a lonely M788 in the back of the pile that ain't barked in some time. When I was shooting it, used 19grs of IMR 4198 and mostly Hornady 50gr spire points. My kid killed a mess of woodchucks with that thing when he was younger.
