Back in the 1970's, when Smith and Wesson was owned by Bangor Punta, they marketed ammunition under the S&W brand. The first couple of years, the brass was headstamped S&W-F, and it was all made by Fiochi. They even offered ammunition in calibers they didn't make guns for, such as the .380 auto. After several years, they switched to someone else for their ammunition, but I can't for the life of me remember who the other company was.
I've been loading all the .38 brass I can get my hands on for cowboy action shooting and haven't had any problems with any of it, except A-Merc, which won't even fit in a couple of my shellholders. The loads are light, which helps, but between my wife and I, we're going through a whole bunch of .38's feeding four handguns and two Marlin Carbines. Generally, if it's headstamped .38 special, it gets loaded and shot, over and over again.
Hope this helps.
Fred