That's an interesting comment. While I think about the possibility I might shoot the life out of some of my .223/5.56 barrels, and maybe some of my pistol barrels, I never considered I would put that much volume through my long range shooters, But I am thinking a barrel should be good for 5000-10000 rounds if not more.
What barrel life numbers are you thinking with respect to 308 and 6.5 Creedmoor barrels?
This is comparing apples to oranges. But, just a ballpark figure, some bench shooters are seeing degradation in as few as 2,000 rounds in the Creedmoor.