Re: 223 55 Grain Recipe
The H335 is the way to go. Varget is great in the 223, but is better suited to the heavier bullets, such as the 77 and 80 grain offerings. The 69s you've got are about the lightest I'd want to go with the Varget.
The H335 works very well with mid-weight bullets like the 55s and will give you good results. Might also want to consider H322 and BenchMark in the Hodgdon line, N133 or N135 in V-V, or Reloder 10X or 12 in the Alliant line. Hard to come up with a "bad" load in an accurate 223.