Got my new CM9 to the range today to start break in. Used PMC and Federal Champion 115 gr FMJ. Shot150 rounds. Started out on a bad note with the slide not locking back on an empty mag the first three mags causing a bit of panic, but then the gun was flawless for the balance of the rounds, shooing both my 6 and 7 round mags.
It also surprised me with it's accuracy. Just great for such a little gun.
I could not be more pleased with my decision to get the CM9.
I am assuming the initial failure of the slide to lock back the first few mags is simply part of the break in process. Since it was flawless thereafter.