I think I'll try the 4831 as that is what I can find. My rifle is a custom built Nosler. I was using their Trophy Grade ammo and getting .5 at a 100. Rifle has a break and recoil is minimum. I'll be using Nosler 140's. I would like to try Alliant powder and see what happens. I use RL17 in my 6.5 Creedmoor with 140 Hornady ELD with basically one hole groups fired through a Tikka precision rifle.I had good accuracy with IMR4831 but my best accuracy has been with RL22 and Magnum primers.
My rifle is a custom 700 with a Hart 24" #5 and shoots 120-160 gr bullets consistently in the .3's.
The best group I ever shot was with the 168 gr ABLR and IMR7828 SSC, that group went .056".