Regarding those who commented on the recoil spring, it may very well be a problem. I took the gun out about a week ago and shot about 100 rounds of 147gr CCI Blazer Brass and S&B 150gr. I got intermittent "live round stovepipes" failure to feed jams. In other words, the gun would successfully extract and eject an empty, pickup up a live round from the mag, then fail to feed it with the slide closing on the live round standing vertically, projectile up between the slide and the breech of the barrel. It did this about 5 times in various mags with both types of ammo.
The gun was freshly lubed with Slip2000.
The only modification I made was the CGW guide rod and 15# spring that had previously worked flawlessly in my P10C.
The mags were brand new CZ 15rd and 17rd that had also worked flawlessly in my P10C.
I could have been limp wristing it because after I cut my session short and cleaned the gun, I found that I had a 101 degree fever!
![Sad :(](https://czfirearms.us/Smileys/default/sad.gif)
I'll put the OEM recoil spring back in and do some more testing....