OK, back to the original topic
I got me some of that Alliant Black MZ Muzzleloader Powder and tried it this week. I like it.
I could not detect any difference in the performance, i.e., I didn't shoot any better or worse, no failures to ignite, no noticeable delay in firing, from the Pyrodex and Goex and I had used previously. On the plus side it is much, much, cleaner than Goex and much cleaner than Pyrodex.
I usually shoot about 20 times when I get to the range. By the end, with the Pyrodex, I start to feel the difficulty of ramming a ball down the barrel increase. Using the Goex, within 3 or 4 shots, it becomes increasingly more difficult. After 20 shots with Alliant the last went down almost as smooth as the first one.
I did notice with the Alliant I had to make sure the powder all came out of my measure, Didn't need that with Pyrodex or Goex. Alliant seems to clump up a little; not sure why.
Cleaning my rifle really showed the difference. I attach some tubing to a nipple, clamp the tubing, then fill the barrel with warm water. With Pyrodex and Goex when I release the clamp after 5 minutes there is a surge of very cloudy black water as the barrel drains into my catch container. The water is cloudy with black such that I can't see through the container. With Alliant that cloud is almost non-existant, only a slight light brown, nowhere near the amount of "soot" as from the others. I can still see through the container with ease. The remaining cleanup went about the same as usual, maybe a little less work with the Alliant.
Now I've got 2 lbs of Goex and 2 lbs of Alliant. The testing will continue, but for now, Alliant is the leader for me and my cap gun. Between, the cost, $10/lb, and being cleaner, Goex and Pyrodex will have to get me much improved performance to win out.