Are these regular 9x19 9mm ??
The reason I ask is that there is a 9mm Action Express cartridge. It is a .41 action express necked down to 9mm. It is a bottleneck cartridge.
AE 9mm = Action Express 9mm ????
Cases are marked FC 9MM? Federal stuff is GTG and non crimped with IIRC and silver primer? I've got lots of that mixed in with my Win and Rem 9MM brass and have no issues. A guy at the range gave me a free case of 1000 which helped me double up.