I just reloaded and shot several boxes of 12 gauge using Rem gun club hulls, Winchester WAA12SL wad, 7/8 oz (24 grams) shot, and 21 grains of IMR 7625 and it seemed like a nice load. It's listed at 5300 psi and 1150 fps. The Hodgdon Reloading Data does still show data for the discontinued powders, but it won't show them unless you search by powder and select the specific powder first. It will also show data for PB and SR4756, but again, select search by powder first and scroll down in the powder section to the discontinued ones. You can add your components in this
https://hodgdonreloading.com/rldc/?t=3