This is a flattened spherical powder. A lot fits into a case because its dense like any other spherical/ball powder that is fine like this. It meters great, has good velocity, good accuracy. I can see why its popular. I would even consider this for military use since you get good velocity and accuracy without high pressure using 55 grain bullets.
If you are into plinking, or loading mass amounts of ammo, this powder is a great choice. it is readily available too.