The CZ-75 is one of the finest handguns ever produced.
I had to replace the extractor on mine about a year or so ago, and doing some research, that's one of the weaker links in the gun. You might want to look at your extractor and see if it's chipping or something.The 75b in 40 with a safety is amazing. I used it for armed security and pin league. Very pleasant to shoot in 40 given its weight. I have probably between 6-7,000 rounds through mine and had a fte last week. First ever malfunction so I'm pretty happy with that.