Is there any powder that will do double duty?

I've been using w231 with the .38 for lighter loads, but I am going to add .357 and haven't purchased any powder yet.

The goal of the 38 is light kicking loads and plenty of them. Goal for the 357 is 158-170 jacketed at 1200-1400fps, but not for volume shooting.

Is there any recommendations for a powder that will do both, or should I just find a dedicated powder for the 357?

Any reason not to go with Lil'Gun if I'm locked into the 357 having its own dedicated powder?

Thanks.