Hello!
The problem is with one pistol (other one, the same, working flawlessly),fired case gets left in the chamber, and the next round trying to feed, jamming the case in. (and mag too)
Pistol is out of warranty. 3+ years old. maybe 50k rds fired.
Things I've tried:
-Factory ammo, S&B, PPU, Geco...
-125-130-135 PF reloads, FP, FP, FMJ...
-Stock pistol, with stock springs
-with and without CGW and CZUB aftermarket parts
-Dozen of recoil springs
-Dry extractor, wet extractor, dirty extractor, super clean extractor
-Dirty gun, clean gun
-stronger extractor spring
-stronger extractor spring with one coil cut off
-new non-used extractor with new non used extractor spring
-with and without guide rod buffer
-took extractors+springs from working pistols
-tried new magazines, magazines from working pistols, new magazine springs...
It is always the same, from the first day I bought it, FTE jam happens in around 1/200 rounds fired exactly as much as you need to spoil your match.
EDIT: spent case is always left all the way in chamber not partially out.