Nosler's manual has data with the 220 Partition, which probably develops similar pressure to the 230 Hybrid. Here are their maximum loads; the velocities are from a 26" barrel:
91.0 IMR7828, 2879 fps
98.5 H1000, 2923 fps
110.0 H50BMG, 2980 fps
93.0 Viht. N165, 2992 fps
They note IMR7828 as the most accurate powder in their test barrel, and 91.0 grains as the most accurate charge.
