Sorry I can't help, but will be tagging along looking for the same info.
I have both H1000 and Retumbo to try behind the Berger 180's and 175 SMK's as soon as i can get a range day.
The wind has put a stop to that lately!
I played some with the 175's 29" 9.5 twist. Fed215 primers
Mine sorta liked 68.5gr Retumbo ES high 20's
It liked 67.5 H1000 better ES teens about 30fps higher at it's node over the Retumbo.
But I currently feed it 162Amaxes 70 H1000