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Ha. Not laughing at you, I'm laughing with you. I know what you mean, although I only had to sleep on the decision of an available rifle (to research it, really) return the next day to DROS it then wait another ten days.
Now, they're by no means perfect. It's been said that this mini-Mauser's action; rather it's 7.62 X 39 chamber, was blueprinted for the eastern-bloc steel-cased stuff. I have experienced light strikes on what seemed to be harder primers in SOME batches of brass-cased Fiocchi, not all. I now avoid brass-colored primers and look instead for nickled primer cups in this brand. Fiocchi's customer service is excellent, and if you find lot numbers that will not work, you may contact them and they'll make it right in my experience.
Once you find a particular lot of brass-cased ammunition that functions reliably in your carbine, identify all boxes and use that. I've had reliable function with all the steel-cased stuff, but in drought-plagued CA we often cannot shoot magnetic at target ranges in forested areas. Winchester white box TARGET 7.62 X 39 is good stuff. When I first started shooting the carbine 6 years ago I had over 2000 rds of some brass-cased Yugoslav Army surplus but with Berdan(?) primers (corrosive primers). I would have one or two FTFS per 100 with that stuff but it sure shot well otherwise.
Some folks have purchased and installed Wolf firing pin springs. I've just done that. I need to get CZ out again soon. It's been waiting patiently while I've doted over more-recent purchases like a .308 Ruger scout, a 1935 Remington Model 34, a Marlin 1894CS357 and a delicious Browning '92 in .44 mag. Too much fun.