Mine is relatively new (around 500 rounds total so far). I had several failures to feed with Federal HV match rounds on my first outing. Cleaned the pistol and used a bit more lube before trying it again yesterday. Shot a bunch of old ammo, dating back to at least the 1970's, mostly Federal's, just to get rid of it, and did have a couple of failure to extracts, but I'm guessing that was likely due to tarnished brass or improper ignition.
I did try some new Aguila in standard velocity, and they would not function at all, failing to eject every single time. I actually was a bit surprised, because I read probably 100 different reviews on the M&P compact 22 before I purchased mine, and many stated theirs would handle standard velocity ammo with no problem.
Also, another "issue" I would like to mention. Magazines are difficult to seat, empty or loaded. They basically have to be slapped to get them to latch into place, something that is normally not an issue on centerfire pistols. Is this normal with this gun, or is mine defective in some way. Thanks.