Re: 338 lapua hunting loads
I would suggest the 338 Lapua for that hunt. That will be a very nice rifle. Guides up there frown on long range hunting particularly for big bears. Inside 1000 yards the 225 grain D62 CE bullet has the best ballistics and has the toughness and energy to kill anything within that range. My guess is on that hunt you will be shooting inside 1000 yards so this would be a good choice. The 300 grain bullets will rock you in a light hunting rifle while the 225's are a pleasure to shoot. I do not shoot the 300's any more in hunting weight rifles.
In my 26" barrel light Lapua I shoot the 225 over 3300 fps with several powders. RE25 is very accurate over 3300 fps at 104 grains in mine but others also shoot very well. If you are planning on doing quite a bit of shooting to 1200 yards and beyond I would try the 252 CE bullet. But for me there is no need to go there in my light rifles which I rarely shoot over 1000 yards. This year the 225 CE D62 out of my rifles took several animals from antelope to elk size in the 900-1100 yard range very effectively. Hope this helps. I shoot and hunt all the time trying to find the best products that suit my hunting needs and report them on here for refference to give shooters other options they may not have tried.
Predictions are difficult, especially when they involve the future