I'm shooting Limited with my M&P Pro .40 with the following loads that work great:
Xtreme FPRN, 180gr, 1.16OAL, 4.7gr of either VV N320 or Solo 1K
Chrono's: Avg Vel = 952fps, Avg PF = 171.5
Winchester SPP
N320 is great, consistent...just expensive. Solo 1K is a good cheaper substitute, just temperature sensitive and powder throws may vary.
Good luck,
rg