Don't know if you've seen it yet, but CCI came out with some new subsonic Hollow Point ammo called "Uppercut" 32 grains hollow point at 950fps. Designed for 2-4 inch barrel Pistol length use, but could also be great subsonic round for rifles (esp. suppressed).

I picked up a few boxes and will be doing a write up soon if I ever get some range time. Also will be testing through the new LabRadar (mini version) Chrony. Stay tuned.