thanks guys, and that link was slightly confusing but I liked his final verdict...
First this:
"The main downfall of the M&P 9mm is the wildly varying accuracy thanks to some QC issues and design flaws. The M&P 9 barrel uses a tragically slow 1:18.75" twist, which does a poor job stabilizing heavier bullets."
and then...
"My 3 primary M&P 9mm's will all shoot 3" or better at 25 yards with any 147 grain ammunition that I feed them, and two of them have printed 2 5/8" standing offhand at 25 yards with 147 grain. That works for me. However, all three of the guns shoot about 6-8" at 25 yards using 115 and 124 grain ammo. My solution at this point is just to stick with 147 grain."
Got a match tomorrow and will be slinging 147s down range!