Any good load for TRG 42 .300 Win Mag?

[Agust1000]

Hi I'm looking for a good load in my Sako TRG 42 in .300 Win Mag,
I have only access to Vihtavuori powders. So any info would be great, also what do you think this combo
Case-> Remington or Norma
Bullet-> Sierra matchking 168gr HPBT
Powder-> Vihtavuori N-165 77gr or N-160 72.9gr
Primer-> Federal Champion primer or Remington 9 1/2M Magnum Rifle