Since no one mentioned it yet, Shooters World Blackout (D063-02) and Socom (D063-01) are also viable options in between H110 and 1680. Socom is slightly faster burning than Blackout.

For subsonic, IMR 4198 and Reloader 7 are supposed to work, but I didn't get them to work before moving on to 1680. 1680 works great but is a bit smokier than I prefer, especially suppressed. The Shooters World Blackout is advertised as a viable subsonic and supersonic powder. I'm just hoping that it's less smoky.

Having had supersonic success with Lil'Gun and H110/W296 since the beginning, I haven't tried the Shooters World powders in 300BLK yet. One reason I got them was to try them in the mid-weight (~150 gr cast and jacketed) plinking range. Being slightly slower burning than H110, I am hoping that Shooters World Socom excels in this range.

Good luck and be safe.