I've been working with Superformance in the 6.5 Creedmoor which has only a smidgen less capacity than the 260. Nice dense, flake powder that meters like water.
I'm a 1/2 gr. over book max for the 123 gr. A-max and just shy of 3100 fps-24" barrel. Bolt lift,brass, and primers are showing no pressure signs at all.
It has a particularly good smell as well. Definitely a powder to try in the 260.
Last edited by FVA; 07/18/11.
