Good powder that produces good energy. It has one serious drawback. The crud ring just means you need to swab between shots, which is something I do anyway. It is not that big of a deal as long as you know it happens. The real problem is with the fouling after the gun has been fired. It draws moisture worse than real black powder fouling. Things will turn to soup real quick on a damp day in a fouled gun. On the range where the gun is not loaded long, or from a clean barrel as a first shot, it is hard to beat in the caplock guns. Reload and sit for an hour or so on a damp day, and it might not go off at all. It is useless in a flinter unless you want to use duplex loads.