I had about 1300 rounds through my RAMI BD and started to notice it was throwing brass quite far and occasionally the slide wouldn't go forward completely, requiring a little push.
I had also been testing different ammo to see what it liked, and some was a little hot, but not +P. I polished the feed ramp and throat, and that helped, and started field stripping cleaning/oiling after each range session (~100-150 rounds).
I had never had recoil springs weaken so quickly, so I contacted CZ USA and they told me that the outer spring could require replacement after as few as 500 rounds. They confirmed the story that those short-barrel springs have to do extra work and fatigue quicker. I got some replacements; and compared to the new one, the used spring was definitely shorter by 1/4"+ -.
After replacement it's run flawlessly through another 700 rounds. It's a $5 part so replacing every 500-1000 rounds is no big deal. I love this gun, and it feels like an extension of my hand.