A larger flake powder. People are divided over this powder for 9 MM. So that is why we exist, to break the log jam and show you the goods! After you test near every powder on the market, you get a good idea what powders do what, and do them well. Unique? It does many things well, and if you only had this powder to load 9 MM? That would be just fine, its a good choice!
Velocity for near standard pressure surprised us, frankly. This powder is high performance! Its accurate! Its nowhere NEAR as dirty as people have been claiming. Nowhere near. We have the "newer", cleaner version, so the old maybe way worse? We don't have it, so we can't judge.
Alliant is a good powder company, they make some of our favorites. I can see why people buy this powder...if you owned more calibers than 9 MM, this would be a good choice! But why would you own pistols in NON 9 MM? Don't you know that 9 MM is the best pistol cartridge in the history of the universe and the only thing that will beat it is lasers? HUH?