My wife and I use 105 gr. FP for the revolvers and 125 gr. RNFP for the rifles. I load them with Bullseye, but there are many good powders that will work. With the lighter weights, I get many more bullets per pound of alloy, since I cast all our bullets, and we go through roughly 10,000 rounds of .38 per year in SASS matches.
Hope this helps.
Fred