Quoted: although sometimes the slide wouldnt lock forward all the way, and would have to be pushed into battery,
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I had 3 CZ-52's, one in 7.62x25mm. The slide on that one would often not go all the way forward with surplus ammo. I forget who made the ammo... maybe Poland... it had like 3 or 4 "centerpunch" marks for a crimp around the neck. I finally determined that the chamber neck was too tight to let the case necks in. This may have only been due to the odd crimp distorting the case neck, but to me this was a red flag for a very dangerous situation. There MUST be enough clearance for the case neck to expand and release the bullet, or pressures can get out of hand.
I recut the neck area of my chamber plenty loose with a .30 Carbine reamer I have, and the slide always closed perfectly after that.
But I was very skeptical of the safety arrangement of the CZ-52. One of my firing pins was too long, and could touch the primer with the firing pin lock engaged. The ledge on the firing pin that engaged the firing pin lock was just about big enough for a gnat to sit on, if it let its feet dangle over the edge. And the de-cocker looked like somebody's brain fart.
Plus I didn't find the grip particularly comfortable and the tip of the trigger poked my trigger finger annoyingly. I eventually got rid of all three, though the 9mm ones were super accurate.