I just shot some fffg Pinnacle and the performance is similar to APP but in my Omega the fouling was much heavier. I would rate it somewhere between APP and Pyrodex for fouling. It shot well in my .54 sidelock with PRB but did not do so well in my .50 Omega with sabots. Black Mag'3 outperformed it across the board with sabots or Saber Tooth bullets. The fouling (or lack of fouling) with Black Mag'3 still is the cleanest I have found. Pinnacle might just be as good as Pyrodex for PRB and a little cleaner and I suspect much less corrosive. I have to find some place to shoot up the five pounds that I bought (looks like the .54 Hawken will work).