I use it for about 2 years, finally gave up on it it is very humid on the downwind side of Greers Fairy Lake where I live. In order to get it to group decent I had to keep it set up with a dehumidifier set up and even then it gave me a lot of trouble. I now use either Black Pyrodex or Blackhorn.
Black in a flinter
Pyrodex in my Triditionals and pistols
Blackhorn in my inlines
This is working well for me
Lee