I just came across this thread and thought I would add some chrono data from my M&P9c. None of these factory loads are +P or +P+.
Win. 115 gr Silvertip 1187 fps
Speer 124 gr Gold Dot 1048 fps
Fed. 147 gr Hydroshock 985 fps
Win. 147 gr Law Enforce HP 917 fps
Handload:
Ranier 124 gr HP 6.5 gr Power Pistol 1187 fps
Now just to throw in something I have worked up for my Colt Gov't 380, 3.25 inch barrel:
Cast lead Lee 120 gr Truncated Cone, 4.6 gr Power Pistol 951 fps.
Win. 115 gr Silvertip 1187 fps
Speer 124 gr Gold Dot 1048 fps
Fed. 147 gr Hydroshock 985 fps
Win. 147 gr Law Enforce HP 917 fps
Handload:
Ranier 124 gr HP 6.5 gr Power Pistol 1187 fps
Now just to throw in something I have worked up for my Colt Gov't 380, 3.25 inch barrel:
Cast lead Lee 120 gr Truncated Cone, 4.6 gr Power Pistol 951 fps.