I'm getting a barrel chambered in 300nm but I'm also getting one chambered in 338 lm for now too. Those are the calibers I'm sticking with for now. But there are so many companies and I only have experience with savage factory and bartlein. I was thinking a carbon wrapped for one but who knows. What are you shooting, what should you stay away from, I'm thinking 28 to 30 inch for both. Are they all pretty much the same?