Best to hold each of your options as you won’t hit nothing at 600 yards if the gun doesn’t fit you. I had a Tikka in 300 for years but sold it for Christensen Mesa. I have other tikkas and really like them but for the big 300 I didn’t like the tikka. But I love the Mesa in every way other than it is heavier than the tikka. Christensen gives you a lot of gun for the money in my opinion.