Add True Blue to the list of useful powders in the .357. 7.0 grains under a 158 SWC will get you around 950 to 1000 fps in a 6" barrel and burns cleanly. I keep a few pounds of it around for the 9mm so it serves a dual purpose.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!