RE: 223 reloads with H322
From what I see in the manual it should be a good load .
My Hornady book lists21.6 at 2800 fps as min. and 24.1 at 3200 fps as max.
I used 322 a few years ago , got good groups .
I now use AA 2460 and will for a while ,bought 4 ,8lb jugs