After posting yesterday, I had the itch to shoot one of the CZ50s and low and behold, I steered you wrong. I use 1.9 Gr of Unique, not 2.3. I use a lee auto disk with the micro disk kit and it throws pretty good charges.
As I mentioned, I would check out Midway, as they do sell a good selection of cast bullets, and they usually ship the same day.