This is true as well. I'm not so much on the fence over twist rate as most bullet weights I shoot are stabilized well by the 1:9 and 1:8. What I do think I'd miss, however, is the 5 r rifling. Some think its a gimmick, those namely with no experience with it, but the concept is actually surprisingly intelligent. In the Sport, it makes for a more accurate rifle, in my experience, to those that are chrome lined. Back that up with melonite coating, and you've got a great combination.
Something tells me, marine, that you're trying to bring me back to the dark side...