AP only get's good reports from those people that live in the extreme arrid climes of the US. AP IS the most hygroscopic faux BP available to consumers.(.) The charcoal element of AP is burnt/oxidized Orange Peel! It soaks up water like a sponge! A clean dry nipple and fire channel that has been "proven" by fireing a dry cap to clear the channel will almost always have a hang-fire with this stuff in anything above 50% humidity! I remember as many posters here do, when AP was "clean shot". They got sued in court for making pellets. Now, that corporation is bankrupt and AP is making square pegs for round holes.
My personal opinion is that Pyrodex is a much better lawn fetilizer than AP powders, it has a higher nitrogen content, greens up faster.
Now before you think I'm nothin but a trad powder shooter, I use alot of T7,,I really like the "Sporting Grade" quality of it and I can find it almost anywhere. I do use Swiss in my rock tossers.