He is also totally biased against Alliant Black MZ. I had just done a bunch of chronograph work using various & sundry muzzleloading rifles and he's trying to tell me how there is such a huge variation in velocities using the same powder I had just done all the work with. He seems to try to get people to believe he's done all these things but I'd put money on what I say. I've actually done a few things he says he's done.
He's kind of washed up at this point, but he is well known in the industry for going after companies that don't offer him product or want his writing services. He's gone after many companies. The latest is Browning/Winchester.
You guys that are getting good groups out of Powerbelts are having much better luck than me. I'd love to have a bullet that was "easier" to work with than a sabot, but my groups start spreading to about 2 1/2" with Powerbelts and are only about 1" with Hornady sabots.