Ramshot Grand will also yield higher velocities and it's burn rate is very similar to RL 26.
Now on the other hand if I were to tote around a 26" tube it would not be in a 30-06 or 30-06 AI chambering. 300 win and up for me.
Do not overlook the athlon. That is what I settled on. Faster to pick up and register velocities. Also will pick up the speed of a hand thrown stick !!!!
Of course that is all academic but the lower price is indeed a big pro.
Remember when it comes to powder its the coating that makes a difference!!! The coating determines the burning rate. The rest is pretty much the same.
Are you keeping the 26" tube at that length?