Forestryguy
WKR
The 270/6.8 is pretty much right in the middle of the most common calibers in the US. (.223 to .375). It seems to be available in most places, you said you already load for it. Is the carbon barrel worth the cost? What would a thinner profile metal barrel cost vs carbon? If it is a hunting rifle that will not be shot as much at a matches then a thinner profile barrel should not be an issue. If you do want to have a longer range day with it, cool it off well between strings.