You can also get a bit over 1000 ft/sec with Sport Pistol, according to Alliant's web data.

I know some folks load Lil Gun for 357 Mag for max loads, but I don't use it as I have read that it burns very hot and has a bad reputation for barrel erosion at the cylinder gap and top strap cutting. No personal experience with it though. Plus I don't think it would be an appropriate load for a coated bullet either; you would probably have leading issues since it burns so hot and gives very high muzzle velocities.