Published data lists lengths but to get custom length I took a case fired from my gun , coaxed a bullet in the case mouth to where the bullet is barely held by the case mouth .
I then slid the dummy cartridge into the chamber of the CZ. I continued to push until the bullet was resting on the rifling at the end of the chamber. I them pushed the brass the rest if the way into the chamber ,sliding it up the bullet until the case moth came to rest on the chamber edge , where a rimless cartridge comes to a stop I then removed the dummy cartridge and measured it.
I take that measurement and subtract a couple of thousands of an inch for my final OAL.....I subtract a couple or 4 thousands so the finished bullets are not resting directly on the lands (riffling)......
make since ?