Sorry to bring this back after a couple months, but I ran a bunch of different ammo types through an M&P Compact .22 LR yesterday at the Albuquerque City Shooting Range (81°F and around 25% humidity at 5950 feet above sea level, and almost no wind) and thought the data might be of interest to some folks here.
I wound up shooting a number of rounds over the chronograph and then many rounds of Federal Automatch 40-gr RNLs offhand (and strong hand and weak hand). It was a lot of fun. The only issues were that CCI Quiet 40-gr RNL will not cycle the action (when you see the numbers, you'll see why) and the very first round of the first loading I shot
after those CCI Quiet rounds (which was an Aguila Super Extra RNL) didn't cycle the action, either - I don't know whether it had anything to do with the CCIs or whether it was a fluke. A few hundred rounds of every other thing I had with me worked fine, though. Toward the end of the shooting, I noted how most of the groups were notably below the POA and adjusted the elevation, and I noticed how this left-handed shooter's oafish trigger finger was placing
all of the rounds to the right of the POA so I adjusted the windage - for me. Most of the five-shot groups were in the 1" to 1.5" range at 10 yards - NOT super-accurate (my Ruger Mk II would be half that size with most of them, and even less with some) but WAY more reliable than I would have expected. Ten-shot groups offhand were (usually) bigger, but not by much - and sometimes smaller.
The chrono data:
Winchester 40-gr Power Point plated hollow point
M 986.1 fps/S 86.38/D 31.87
CCI 40-gr Velocitor plated hollow point
M 1006/S 69.28/D 34.51
Aguila 40-gr Interceptor plated solid
M 1067/S 96.32/D 48.12
CCI 32-gr Stinger plated hollow point
M 1201/S 52.57/D 21.70 - decent group
Federal 40-gr Game-Shok plated solid
M 1079/S 44.14/D 18.16 - small group
CCI 40-gr Christmas 2016 packaging standard velocity lead solid
M 890.2/S 69.93/D 25.69 - vertical string
CCI 20-gr Copper solid
M 1174/S 157.5/D 62.73 - small group with one flyer
CCI 40-gr Quiet lead solid
M 598.9/S 40.23/D 18.94 - these would not cycle the action
Aguila 40-gr Super Extra lead solid
M 914.9/S 37.40/D 15.68 - first round of ten failed to cycle action; shots went into 2 small groups
CCI 40-gr SGB lead flat-point solid
M 986.0/S 90.1/D 32.74 - small group
Federal 40-gr Automatch lead solid - check out the consistency in these strings - small groups
Five-shot M 997.5/S 56.38/D 23.62
Ten-shot (standing) M 980.5/S 49.76/D 19.92
Ten-shot (standing) M 979.5/S 48.03/D 18.00
Aguila 40-gr Super Extra plated solid - shots
also went into 2 small groups
M 957.8/S 51.6/D 16.55
Sellier & Bellot 40-gr HV lead hollow point - Man, I wish I had more of this; I might need to check!
M 985.6/S 23.53/D 10.67
SK 40-gr Pistol Match lead solid
M 880.5/S 35.55/D 14.14
I shot WAY more of the Federal Automatch (a fresh box from a while back, when the stuff was good stuff) than anything else, with the Winchester Power Point plated hollow points behind that.