The following are my chrono'd velocities out of my M&P 10:

Factory:

Winchester X-S 150 gr 2671fps (vs. 2820 fps on box)
PRVI 145 gr FMJ 2684fps (vs. 2838)
Twin Cities M80 Ball 147gr 2717fps (vs 2790)

Handloads:
165 gr Hornady SST w/43.5gr RL-15, 2600fps
165 gr Sierra GK SPBT w/43.6gr RL-15, 2555fps