I am currently looking at converting my CZ-82 to a .380 to match the CZ-83. They both use the same mags.
I already converted my CZ-52 to 9X19mm it feeds just fine. I think I am lucky there since many people have problems with it feeding.
I also converted a PA-63 to .380 It feeds just fine but I think I have to work on the extractor. I purchased a AP9 exctractor that is chambered for .380. All of these FEG pistols based on the PPK have interchangable parts.
As I recall the feed ramp/mag. is the real culprit.The .380 mag releases the cartridge a shade sooner.I can't remember exactly without one in my hands.I advise not messing with the extractor unless you have a new one at hand.At any rate I know almost positivly it is the angle the extraction rim is at when it starts to go in the extractor.Also,have you changed springs? sam.
Seems to be some confusion concerning which rounds are in which conversion.
The CZ-52 converted from 7.62X25 to 9X19. The base of the 7.62 case matches the case of the 9X19, that is why the conversion seems to work so well. Some are lucky enough not to have to modify the mags, some require slight bending of mag lip.
The CZ-82 converted from 9X18 to .380 (9X17 Kurtz) they use same mag. The .380 round seems slightly smaller in diameter than the 9X18
The PA-63 converted from 9X18 to .380, again as in the CZ-82 they use same mag.
I do not think the .380 is a better round than the 9X18, but I can buy cleaner ammo in .380 at a cheaper price than the clean ammo in 9X18. When finishing a day of shooting wolf ammo my hands look like I just setup the grill with briquets.