Loading for the 38 special in this game is very easy. I've been loading for over 60 yrs and have always advised folks to use established loads recommended by the MFG. That is of course always a safe answer to give., and it is MY suggestion to you. For my OWN use, I've never found ANY fast powder that will not work in a 38 special for the game we play. When shooting the large targets that are right in front of the end of the barrel, it doesn't take a refined and dialed in, extensive case scrutiny load to get the job done. Anything that will leave the end of the barrel will usually work. Yep... some loads will increase in pressure a bit when down loaded, but much more so with over loaded. But remember this, 99.9% of the guns used to shoot 38's out of in this game are proofed for the very high pressures developed in a 357 Mag cartridge. The guns that I've seen blown up did NOT come from shooting a 38 special with a small charge of fast powder. Don't take all of this to be too caviler, reloading ammo can have dangerous results, but in general working at the low end of things such as we do in this game is not as critical as some folks think.