Smokeless powder, although commonly called gunpowder, is actually quite different than 'Gun Powder'. These powders are a Class 1.4 (UN0509) Explosive as defined by DOT. Gunpowder on the other hand is actually Black Powder and is a Class 4.1 (NA0027) Flamable Solid as defined by DOT.
Although the names are similar, they load, react, store and ship quite differently. Additionally, they should never be mixed nor substituted for each other. Gun powder/blackpowder, should only be used in firearms designed for them, and is considered less efficient and dirtier than Smokeless Powder.
Smokeless powder is what most reloaders look for, and there are hundreds, if not thousands of different kinds, both civilian and military. Many, many powders are made outside the United States and are imported. The biggest distributor of powder in the US is Hodgdon, and they import from all over Europe, Canada and Australia. Their distribution now includes not only their own brands, but also Accurate, IRM, Winchester, and Ramshot.
Although the chemical composition of this powder is known, each manufacturer uses a slightly different formula to reduce flash, reduce smoke, stabilize storage, change shape, burn speed (burn rate) and reduce fouling and reduce wear of the barrel.
Below are the powders we currently supply, with those in stock shown at the top of the listing.