I just loaded some up for my 260ai as well and went to the range on Saturday. Accuracy was pretty good, less than 0.3".
What load are you using to get to 2825? I forgot my chrono at home, so I won't have a speed until next time I go out.
I don't have my book in front of me but I think it's 48.5gr (could be +/- a tenth or two) 4831sc in Lapua brass with WW primers. Good solid .5 - .6 MOA load. ES is a little higher than I like for a target load, but I needed something to run with for hunting season so I settled on it for now. I'll tweak it a bit more come January.