That used to be pretty common with bull's-eye match shooters. For 185-grain JSWC match bullets, 4.2 grains of Bullseye or 4.4 grains of 231/HP38 were used to copy factory match load performance. For 185 and 200-grain lead bullets, loads were typically 3.5 to 4.0 grains of Bullseye or about 3.8 to 4.3 grains of 231/HP38. These needed lighter recoil springs, of course. A lot of guys liked the better metering of 231/HP38. The only gripe was it could burn a little less completely and, especially with the lower loads and lighter recoil springs, toss a few small burning grains out during ejection, so you wore your glasses religiously. The guys shooting revolvers didn't have that problem.