Must admit I've never tried H4350 with 200s in the .30-06, due getting such great results with H4831, both SC and the "long cut" version.
Have used plenty of H4350 with other bullet weights, especially 165-168 grain, where it's among the very best powders.
It probably would work fine with 200s, but due to its burn-rate doubt H4350 would match the velocity possible with slower powders.
