I know what ya mean Don, I have been using wheel weights since the 70s. With a gas check, I can load a 170gr in a 3030win, and get no leading at 2400fps. With a 357mag, once you pass 1000fps, it leads with no gas check. I agree on the 38 special brass, but I have found over the years that even that brass lasts longer with Unique than the fast burning Bullseye.
I have loaded and fired thousands of rounds with both, but have always been more comfortable with the Unique when loading and shooting in such volume, so have stopped using Bullseye.