Well honestly I think a 210 berger would need a 9 twist because it doesn't have enough ass to push it fast enough and re17 is to cold for a 308 you'd do better with re15 and your only going to get about 2350 fps with 44-45grns re15 compressed.
Your 1 in 11 twist will shoot 210 gr Berger very nicely. My sako trg has a 1 in 11 twist and I shoot that bullet often.
I haven’t used RL 17 with the 210 gr yet. But I have used 190 gr bergers with RL17, that powder only gives better velocity in the 308 w when heaver 190 gr + bullets are used other wise your better off with H4895 or varget. these are my chronographed speeds in lapua brass which has less room than Winchester brass. My early RL17 loads were worked up from 45 grs …….
190 gr berger VLD 48gr RL17 2585 2646 2628 2649 2639 FPS AV 2629 ES 64.
48.5 2703 2672 2692 2704 2698 FPS. AV 2694 ES 30.
48.8gr 2700 2709 2703 2733 2724 AV 2713 ES33
I've been doing a little web surfing and have found shooters using 12 twist and faster with the 208/210 gr bullets and getting good results. Charges between 44.0gr and 50gr. seem to be used by those inclined to work with the RE 17. The 208 A-Max has a bigger following than the 210 Bergers but I've got a few boxes of the Bergers on hand so that's what I'm using.
I'll get a few Lapua cases loaded up and see what's practical in my rifle.