Any of the premium self-defense ammo seems to be quite accurate. I like Speer.
But for range use, CCI Blazer, if it runs in your gun -- it doesn't run in all CZs -- is good. As is Sellier & Bellot, PNP (Pretoria Metal Pressings), Denel (same company), MagTech, IMI, and a few others. Check the FAQ area for guidance on ammo.