Hodgdon reloading data also has 67.2 as max for H1000 & 175 gr bullet. I also got similar velocities with H1000 to what @deputyrpa reported.
I didn't feel comfortable to push H1000 more than about 0.5 grain so I just switched to RL26 which Hornady lists a max of 67.1 grains also. With RL26, I...