There's a ton of 6.5 WSM's around here. Most that I know were stated out with Norma MRP -2, 66grains or so. But that powder is gone, no longer imported into the country. VV N560 seemed to fast, but N570 may work. Western powders does have Norma's new 217, haven't seen it for sale anywhere, this should work also, get something in those burn rate ranges to start.
130-140 VLD's seem to work great, with velocities from 3250-3450 fps. It's one hell of a round, but they do warm a barrel up fast.