I've only ever used H1000 with the 215's. shoots so good at 3000 FPS I don't t think I could improve on this load. From what I've seen this is probably the most used powder with the 215 Berger. I'd start with H1000 and 30 thou off the lands.Ordered 215 Bergers and should be here this week, Reloader 16, 26 and H1000 coming as well. Anyone load the Berger with Rl-26??