Probably good advise but it's the #13 main spring that's the issue and not anything else. This was with my sold CZ85C. I switched back to the factory main spring and it cycled and fired fine.
There's more to it than meets the eye. I'm using a 13 lb spring with a couple of coils cut off it and I'm still getting 100% reliability. But EVERYTHING must be totally clean. In particular I tend to remove the firing pin and make sure that the slide hole for it is clean when doing my full strip and cleans every couple of thousand rounds. And again a very light wipe of light body oil is all the lubrication the firing pin gets.


















































