I have been shooting APP and Black Mag'3 but mostly with sabots which of course shoot dry. I just bought a T/C Hawken and plan on shooting PRB. I would suggest that one lube that works well with most black powder loads is SPG or if you want a patch lube I would recommend Ballistol either full strength or cut 50-50 with water. Those are the two I plan on trying with Black Mag'3 or Pinnacle and APP is a similar base (ascorbic acid base) powder.