Titegroups, Trail Boss was designed for cowboy shooters, no argument there, but it was to prevent double charges of fast burning powders. The problem with it is that it delivers lower velocities with higher pressures, sometimes much higher than other powders that are listed for a given purpose. It is not nearly as versatile as the old standby powders or some their newer contenders that can be reduced a lot more than most loading manuals will tell you, even if they do list specific cowboy action loading data. With most powders you will get unburned powder with reduced loads because they need pressure to achieve best combustion and reducing the load reduces the pressure. With Trail Boss's low velocity at high pressures you won't see much unburned powder, but that isn't a plus in my book.