Going to keep this thread active.
Shadow is approximately 120 days old. When i first took the gun to the range I used 124gr (some 125gr) and 147gr ammunition.These were my reloads. Halfway through took 115gr factory ammo with me (winchester white box, Blazer, Sig). With the lighter grain ammo failure to extract. Case halfway out of chamber stacked on top of next round, Pull the mag out literally and remove case. This could happen once per mag or twice. Number of rounds in mag doesn't not matter. It happens with all three mags.
So with the help of this forum and Enos I started to slef diagnose (instead of sending gun in for repair}
First the extractor has been out of the gun three times for cleaning. The first time was gummed up with some sort of factory grease. Extractor itself looks fine.
Second I have put the Extra Strength extractor spring. Had to clip a coil off for fitment.
Third I ordered Cajun Gunworks Spring pack (recoil). I have run each spring to the same results.
Mind you this is with factory ammo. So I started measuring COL of factory. They are long. 1.15-1.17. My reloads are in the 1.13 range if not shorter. Yesterday I took 200 of my reloads to the range
115gr Berry's HBRN TP
Winchester case
CCI SPP
4.5 grains of Winchester 231 (1108 fps average through chronograph)
Cases were spotless, Roll Sized with clean primer pockets
They ran flawless.
I loaded WWB 115gr right behind it and the gun jammed repeatedly. Had all the recoil springs laid out . Changed through the lighter ones. Went back to stock. No go.
I look at the extraction failure and i see a round stuck underneath the case to be extracted. The mag is stiff to drop. It has to be dragged out. The slide and extracted case cannot drag accros the round to be loaded. The recoil springs have been run from lightest to heaviest.
Is it time to send it back to CZ.
This is only with lighter grain projectiles. 124 and 147 ran a omplete mag almost 100% of the time.
I suspected the mags at first but since it happens with all three. Tune the mags? Polish the bolt?
I have a spare slide stop, extractor, extractor spring and something I probably can't remember. These parts were purchased after buying the gun as wearable parts not for this problem.