You can download the new Sierra load manual on your phone for free. They seem to favor Power Pro 2000MR and H4895 for their tiny selection of bullets.
I am guessing Nosler has a most accurate load listed in their data also?
Those would be good starts to compare with what you hear here.
I have a .338 Win Mag. I only shoot Nosler Partitions and Barnes TSX bullets out of that one though. When i shoot it...... Ouch....