The CTR on the 85s drastically limits your ability to seat VLDs out where they should be. I have built a couple of sakos and that’s a reoccurring theme. To solve this I order my reamerS 10 thou over my maximum magazine length. You’ll lose some OAL on the sakos, but they are fantastic actions. As far as building the 85 kodiak I would hesitate... it’s in a very heavy stock so if you go and put in a barrel that is 50% heavier you will destroy your intended weight goal. You’re 338 WIN is more than capable to 900 yards with proper bullet selection. Pardon my saying so but you’re reinvented the wheel here by rebarrling one of the best factory rifles made. The ONLY reason I would rebarrel would be if you’ve burned your throat out.