A couple of things. My experience is the CZ's have the shortest throat of anything I load for or anything I read about. First thing I do is to establish the max OAL for all the 9mm's I load for. Then I set my max OAL length so everything I load for will function in all my pistols.

What you found is you can't necessarily take the OAL listed in the manual as a given the round will function in your pistols. If you load with a shorter OAL the pressure will be higher. If you load longer the pressure will be less. And that is only if you are using exactly the same bullet. Same grains but different bullet with the same OAL the pressure could be different because the seating depth can be different due to bullet length (even though they are the same grains and type). The way I keep track of this is to record and establish my max OAL. Notice with lead the CZ's are the shortest.