I’m using the Lee 93gr RN cast from a 6cavity mold powder coated with Harbor Freight PC over 11.8gr of #2400. Drops the cases over my rifle shoulder (LH shooter). I’ve also got and use the Lee 100gr RN but 2-cav casts too slow...
The Lyman Cast bullet manual has data for lead bullets.
Best bullet for most use in .30Carbine is the Lee 113fngc. Even 15gr of H110 works good (2100fps!).