With the CZs shorter leade, I had to reduce the OAL slightly for my 9mm reloads to chamber in my Shadow 2. I had the same situation with my .45acp reloads when I got my 97B. I use a chamber gauge but when working up a round, I make sure it will plunk in the S2 or 97B. If it does, the round will work in any of my other pistols. Once the OAL is correct both pistols will run like a raped ape.