H-1000 may turn up some good accuracy, but my rifle found it hard to digest on changing days in regard to weather, it also exhibited changing velocities day to day. Looked good to start with, but fluctuated too much for me to continue with it.
I got my very best results with RE25, in accuracy and velocity, the velocity was an eye opener, by far faster than any other powder I tested and the most consistent. I had ES's of 8 with 208gr A-max's and ES' s of 11 with Nosler 190gr HPBT's.
If you can get some, give RE25 a try, you may be surprised with it's accuracy.