If looking for a Win231 load and none listed, look at the HP-38 listings. Same powder except for the labeling, and of course the usual lot-to-lot variation. I've used a great deal of HP-38 that came from a 40lb keg that had a St.Marks WW231 lot#.
My Hornaday #3 manual WW231 POWDER
38 148 gr HBWC 3.5 gr 800fps 4.2 gr max
158 gr lead RN 4.0 gr 800fps 4.4 gr max
158 gr SWC JHP 4.8 800fps 5.1 MAX +P
125 gr SWC JHP 5.6 GR 1,000 FPS MAX +P
110 gr SWC JHP 6.5 GR 1,150 fps MAX +P
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Since 1924