I've used 26 in my 6.5 Swede with 120 Northforks and 130 Accubonds and Scirrocos. I've gotten great speed out of them both and good accuracy.
A buddy just picked up a 6.5x47 Lapua, he tried 4451 and wasn't getting very far speed wise with. After I mentioned trying 26 just to see if he could get enough in the case he worked up to about 2900 with 130 Bergers. Said it was a little crunchy but it worked. I would have never thought it would work well, but it did.
