The best velocity and full power load I have used was the 210gr Hornady XTP on top of 17.5grs of 2400 in virgin factory primed Winchester cases the load produced an average of 1,413 fps 10' from the muzzle from my S&W 57 with 6" barrel. 17.5grs or 2400 was the max load listed by Alliant in their free manual, other manuals listed higher and lower max loads from 16.5 up to 20.0 grs for 210gr jacketed bullets.
A load of 20.3grs of H110 produced 1,286 fps using the 210gr Remington JSP from the same pistol.