If my 32 ejects too robustly (12 feet) I assume a stiffer spring would probably reduce that. But, CZ just shows a CZ83 recoil spring with no mention of caliber. If they are all the same then I would try one of the Wolff springs in a heavier weight. If CZ differentiates, I would try the 380 or Mak spring. The barrel od is the same for all calibers, yes?