Same problem with RS62 in my 6.5x47 with 139gr scenars.
You need a couple of movements of the ram to seat it fully due to the compressing of the powder..
With the 140gr amaxs I can use 0.5grs more at 41.5gr that gets 2800fps from 24inch barrel..
RS60 is much less bulky..
I've got some ready too test..
Seats sweet as with no compressing.
I tried a few with 39grs of RS60 as a speed test and it pushed the 139gr scenar 2830fps which would be a mild load.