I saw your post a few days ago, but have been a bit busy to respond.
Yes, I've reloaded for the CZ 50 (or 70) using my own cast lead bullets and Lee Alox lube. They worked quite well with just a couple of grains of HP38.
Dillon (the blue press guys) sells a RN bullet that looks like it would work perfectly in this app. as it was very similar to what I was loading.