My 260 by MCR

[trebark]

Great FPS! Did you try H4350 with that bullet? That's always been my go to powder in all my rifles for the 260 and 6 Creedmoor.

Yes, I tried H4350 and H4831. Surprisingly, both produced disappointing velocity results. Like you, H4350 is my go-to powder for cartridges like 260, 6.5x47 and 6.5creedmoor. After much testing and comparing results to QuickLoad data and anecdotal data from others, my sense is that it's the barrel that's a bit slow. According QuickLoad, 47grains of Superformance 'should' produce ~3000fps.