What are you shooting them in? I would use your barrel as a chamber gauge. Start around 1.12” OAL and see if it plunks. If it fully seats in the chamber when dropped into the barrel, then see if the cartridge spins freely. If it doesn’t plunk (fully seat), then seat the bullet a little deeper, and try it again. CZ’s tend to have a short throat and tend to need a short OAL, around 1.06”. My Glocks have a longer throat and can be loaded longer. If you have to load to a shorter OAL, starting at 3.8 gr Titegroup should be okay. But if you find a longer OAL works, you might want to start a little higher, say 4.0 gr and work up from there.
See Hodgdon’s Reloading Data center and note the different OAL for different bullets and charge weights differences.