Quote Originally Posted by mrvco View Post
I have had some issues with the slide on my CW9 locking back before the mag is empty using the Speer 124g +p ammo I haven't figured out what is causing the issue yet, but I haven't heard of anyone else having this issue.
Hot, snappy ammo and your pistol recoils more briskly. As a consequence, you hang on more tightly and your thumb sometimes gets in the way of the slide lock.

I bet the problem vanishes if you shoot it with your left hand.