I owned a 6.5 Super LR and would do it again over the 260 I had previously. Better case design, exact same ballistic (velocity) performance but more consistent and easier to tune.
FWIW, anyone looking for dies I would recommend Whidden. I owned a Redding and a Whidden set for the 6.5 and the Whiddens were superb, and cheaper than Redding. The Redding set gave around 0.005" runout, even with the VLD seat stem, Whiddens averaged 0.001". Never tracked down the cause of the runout with the Reddings, but both die sets were set up identical.