What powder and bullet weight do you plan on using? I have used 4.0gr of Titrgroup with a Polymer Coated Lead 115gr bullet from SNS. I have also used 6.0gr of Accurate No.7 with a Extreme Plated 115gr bullet. Both shot fine in my M&P 9mm.
I just shoot my standard 9mm load through mine, shoots fine enough. 4.7gr Red Dot with a 115gr powerbond bullet, forget my OAL, been a while since I had to reload 9mm