As far as I'm told the only difference whatsoever is the trinite (??) coating on the outside of the barrel, as well as inside the action, strictly for extra resistance to corrosion due to the elements, ie. weather, water, etc. If you find that there is something different with the barrel or accuracy, let me know please. I just bought a 300 WSM in the Remington 700 XCR and haven't shot it yet. Good luck either way.