Re: .308win & RE 17
1: The 11x will stabilize them just fine up to the transonic zone (well past 1000 yards).
2: RL17 is great but I have had better luck with VV N550. It settles in the case better for deeper seating depth allowing me to load them into a Wyatt magazine. It also takes a tad less powder for equal velocity.
All in all, the 208/210 with RL17 or N550 is a note worthy combo for the 308.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.