Another station heard from
I have a CZ75 "pre-B", 92 proofmark, bought new in '93 or '94 and shot some, but not a lot right away.
I campaigned it in IDPA SSP (Yes, I let the hammer down to get to a DA start. No ADs or even a slip in that direction.) in 1998, with lots of practice and every match I could get to. No misfunctions with any jacketed ammo, factory or handload.
I got it back out for a run at IDPA SSP Expert in 2001, plus IPSC Production. I started having Failures to Eject. I changed recoil springs, magazine springs, and cleaned under the extractor (Ick!). They continued. I tried S&B factory. It seemed ok in several trials so I took it to the Nationals. TWO FTEs in one major match! One didn't matter much, but the other was a spoiler.
I went back to 1911/CDP after that so my CZ sat on the shelf for a while, until I read this thread. I ordered (and paid for) an extractor and a couple of springs. I installed them the other day. The extractor looks a little more crisply machined, the new springs are substantially stronger. This is not a scientific experiment to isolate the variables, so I replaced extractor and spring both. I shot the gun this morning. It works fine. It will take a while to build up some stats and regain confidence, but I think I have got it. If I had to guess, I would say the spring is the key. I looked at a Witness that had a much stronger extractor spring than my old one, maybe even a bit stiffer than the new one.
Guns are machines, they take some maintenance.