WW 231 with any bullet you care to choose.
My standard "oh let's shoot some .38 Special today" load is a 158-gr. hard cast lead bullet with 3.5 grains of WW 231.
Churns out between 750 and 850 fps, I think, and is mild and fun.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.