Mine loves 180 Accubonds, and Reloader 26 will run them faster than they're supposed to go
Still working on load development, but it will toss 190 LRAB into sub-MOA groups, running 3150 fps, so I think it's just a load development thing.
I'll probably try Retumbo as well, but I can see using R26 in other calibers, and I'd like to stay with powders that I can use in multiple cartridges.