Trail Boss was really developed for cowboy shooting. The one pound containers only weigh 9oz. so it's a bit more expensive than standard powders, but burns well at low pressures. Reducing recoil as much as possible is a primary concern to cowboy shooters not only to get back on target fast but also because the steel is so close you get a lot of bounce back. So much so in fact it's difficult to be competitive with anything but the 38/357. Trying really light loads using 231 results in lots of unburnt powder and occasional misfires. Titegroup isn't so sensitive to it's position in big cases and seems more reliable for this type of use. Trail boss is a big improvement with it's high volume and maximum exposed surface for easy ignition. Trail boss also works well in rifles for subsonic loads along the lines of the 300 whisper and is popular with the "snipers".