RE: .338 bullets? 275gr, 300gr?
A friend and I have 340 Wby. Mags. we bought 20 years ago for elk. We loaded the 250 grain Sierra bullets. Wehad great results with these bullets. We tried a few other bullets, but they would not shoot as well as the Sierra's. The Barne's bullets we tried were disappointing, but they were the X-bullets. I do not believe I would pay for the new expensive Barnes bullets. There is no way they could perform any better than the Sierra, and I doubt if they are any more accurate, but they sure do cost a lot more. My 340 has not been out of the safe for over 10 years.
If you need any brass or dies, let me know. I might have some extra I could give you a good deal on. Tom.