There are some claiming negatives about APP but I find it to be my favorite sub for black powder shooting BUT I am sure that any indoor range that would refuse real black powder would refuse APP also. What I find real attractive about APP is that the need for special bullet lubes is eliminated, in fact they recommend no lube, but it tends to be slightly less powerful than real black but thats where Triple 7 can step up, it is slightly more powerful then real black! I think it was a mistake to have dropped Pinnacle from the Goex line BUT only time will tell. Goex was my black powder of choice and I was able to mix-match case lots of it with Pinnacle.