FWIW, Nosler's Fifth edition lists IMR4350 as their most accurate powder tested for the 180. 78 grains to start, most accurate at 80 grains, and 82 max. Starting speed @ 3053 and max at 3187 from a 26 inch barrel.
That's in a Federal case with Fed 215 primers seated at 3.6"
For 200 grain Partitions, they list IMR4350 as most accurate again. 77 grains being the starting load and most accurate, with 81 grains max. 2916 fps starting and 2995 max.
Can't speak to the 30 Rem Ultra, but all the load recommendations I have tried in this book have been pretty darned good for the applications I have tried.