While I still believe what I wrote earlier when Clay did the 10,000 round test he used 115 gr American Eagle ammo https://www.thearmorylife.com/hellcat-kills-10k-rounds/
My mag release button is unbelievably stiff to where it's nearly impossible to release it single handed -- is there a way to loosen this up or does it need to be removed and cleaned?
I ran about 580 rounds thru my EMP4 when I got a consistent failure of the slide to lock open on the last round using 115gr FMJ Blazer ammo. 124fr ammo worked ok. I tore apart and cleaned my Mags and that seemed to correct the issue with the 115gr. I'm wondering if I should replace the springs...
I had issues at first with my 9119 but after a break in of about 250 rounds using 124gr FMJ rounds things were working pretty good. I love this little gun. Sent it in a couple of weeks ago because a screw on the grip came loose and I was unable to tighten it -- needed to send in for Spi Armory...