No, you have to shoot 168's to get the same BC you get with 140's in a 260. Nobody shoots a 7mm/08 in competition for this reason.
Is a 7/08 a great hunting round? You betcha. I think the B&C reticle was designed for it, 140's zeroed at 200yd make the reticle(s) work at 300, 400, and 450, which is about as far as most of us have any business taking a shot.
