My suggestion is talk with your guide for his opinion
But if you choose any premium bullet the two calibers you mentioned will work just fine
Hi Phil. Heading there late October this year. Going with Greg Acord. I have a custom .375 Ruger built by LeRoy Barry (Canyon Creek) Defiance rebel SS Action. Handloaded 300 gr TSX. It will be my first time on Kodiak. Can't wait....