when you say "H4831" do you mean IMR4831? That is a powder load from the reloading book I have. I don't really feel comfortable using a powder that is not listed in a book.
The powders listed under the 160 grain bullet options are IMR4064, IMR4320, IMR4350, AA3100, RL19(my neighbor has this powder), RL22, IMR4831, Vihnt N165 (most accurate powder with their test rifle), IMR7828, and H870.
Keep you initial tuning simple.
Get a good reloading manual and read it.
Start with the recommended minimum power charge, and work up in 1/2 grain increments until you either experience pressure signs, or reach the max load. Shoot groups. If you get some good results, load up some more of the load that produced the smallest groups and see if you can reproduce that result.
For powder, I'd start with H4831, It's and old classic that's worked well in 7mm Rem Mags for me in the past.
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Nope, I mean H4831. It might not be in the book you have, but it's in plenty of others, and as RR mentioned, Hodgdons provides data for it on their sight.
Of the one's you list in your book the two I'd try first are IMR-7828 and RL22
If I were to try one of the new breed of IMR powders, 7977 looks like it could be interesting.
