Well I'm not sure about the powders but I can tell ya that I've shot somewhere in the neighborhood of 8-10 boxes of magblends this year trying to find the best patterning combo and it does seem as if their loading isn't consistent. What I mean is, different wads and shot sizes varying more so than they say. I usually shoot a felt type material with a coated backing that I get from work. It stops a lot of the shot when firing from 40 or farther. So I could see all different sizes of shot including several bbs that would be stuck together. Some shot bigger than 4's and some way smaller than 7's. Patterns were inconsistent ranging from 108 to 200+ hits at 40 yds in a ten. I ran a bore snake through the barrel twice in between each shot trying to keep the shots consistent. The wad differences kind of surprised me. One wad type was clear and would actually tear when fired. Sides would come off half way up. The other type was a grey or light blue color but was clearly a more durable wad. Also patterned better. This has been my experience this year with Hevi shot and I do feel like for the cost, things could be more consistent.
