My first loads for the .38 Special were with 158 gr cast swc's, and HS-6 about 30 years ago. I have used it in that round as well as several other since then, and have always been very satisfied with its performance. I worked up to the max load in Speer #9 which is 5.8 grains, and it always shot quite well out of my first .38, and .357.

It has worked well in many other .38's that have came and went since then too.