H322
Not bad, pretty good.  But on fast side for use in 5.56 for sure.   This is 50 yards.  2 groups at bottom are about 1 MOA, or about 1/2 inch at 50 yards. 

Of note, the upper right load, labeled "test" is probably the best all around load I have ever found in 5.56.  Benchmark 25.0 grains using 55 grain Sierra BlitzKing.  I shot it here for control group.  I don't recommend H322 for 223, you can do better with Benchmark, or various other, slightly slower burning powders.  H322 is like VVN130 for example in burn rate.  Maybe good for 40-50 grain bullets at most.