HS-6 and AAC#7 are the two very best powders available for the 9mm, IME.
Start low, around 6.7 grains and work up slowly and carefully. It's easy to get good velocity at reasonable pressure.
My HS-6 loads clock 1300-1325 FPS from my Beretta, and the cases can be reloaded 6-8 times. This is the same velocity as my factory +P+ carry load, but with the long case life, it's obviously not +P+ pressure.
AAC 7 was specifically formulated for the 9MM and 124 grain bullets, but works perfectly with 115s..