I've loaded many different combination for .270 win, it's my over all favorite cartridge. My favorite hunting bullet is 130 gr. Hot Core, but for punching paper the Speer 130 gr. PSPBT is super.
IMR-4350
RL19
RL22
IMR-4831
H4831
IMR-7828
H-1000
Of those listed above, IMR-4350, RL19, RL22, H-4831. and IMR-7828 all delivered stellar performance. But in my experience the slower burners almost always deliver the best accuracy and velocities. Most slow burning powders perform at their best when worked up.
If I had to name on single powder as my favorite, it would be IMR-7828.
GS