I was wondering, does anyone know of a good way to store blackpowder? I know there are different types out there(blackpowder,pyrodex,etc), which would store the longest and be safe when you are ready to use it?
I use Pyrodex powder so I am not sure if it store longer or better than no kidding black powder. I didnt have to deal with this type of powder when I was in the military so I am not sure about any unique requirments or concerns. It is hydroscopic though meaning that it has a tendency to absorb moisture. Im not sure if this is less of an issue with the synthetic powder substitutes.
I will say this though.
It should be stored in its original container as the container is specially designed to burst open easily and allow for the powder to burn without causing an explosion.
I would not store overly large amounts of it in any one place. If you have that much I would seriously consider multiple storage locations to minimize the amount involved if you have a mishap.
Do not store it in area where there are heat sources, sources of sparks or ajacent to electrical equipment that could provide a source of ignition.
I would check it on a periodic basis to check for deterioration. You can look on manufactures web sites for things to look for if this is happening.
Also note that there are specific regulations that apply to black powder that do not apply to smokeless powder. Most of these regulations are in regards to the amount you may posses on hand and storage limits. Dont look at just federal regulations, consult local regulations as well. The local fire department is a great source of information in this regard and can point you to written information and codes. The fire cheif or marshall is the person you want to talk to. They will also be the one in all probability that will be enforcing those codes!
Black powder has survived buried in wooden kegs from the French and Indian war and still fire fine. Smokeless which Pyrodex is really if kept dry will last probably a century or more. As for storage I use the containers it comes in and picked up a hardwood box (Cyprus) from Dixie Gun Works called the Old Ebenezer shown below. Perfect for a powder storage box even according to government recommendations. Don't store powder in metal boxes though.