RE: 777 or Pyrodex
In my guns Select shot better than Pyro RS.T7 also shoots well and perhaps a little easier to clean than Select but in the end it still takes about the same amount of time.I have found the fouling from T7 seems a little dryer and seems to make it a little more difficult to push the next round down the bore.On the plus side you can use a little less powder and get the same performance.