"Black powder becomes more powerful and more dangerous as it ages."
Rough quote of an interview with a curator of an exhibition of blackpowder rifles at a large museum in Chicago. It appeared in the Chicago Tribune.
The admittedly young curator also stated in the interview that after having an "expert", with special tools and chemicals (Dawn Dishwashing liquid, water and an clock oiling syringe), empty one gun of powder and ball and a half full powder horn: "It was the equivalent of 10 lbs. of Dynamite!"
The young lad should be allowed to handle neither Dynamite nor black powder. His ignorance is astonishing.