Nucum said:6.5x47 Lapua needs a better powder.
I've been working with a couple of 6.5x47's for the last 6 months, using both H4350 and Re.15. I'm not getting great numbers,velocity and E.S.)_from the H4350 and I haven't seen a dirtier powder than Re.15 since I got rid of my muzzle loader.