"I saw an ad for Unique(I think), where the factory has kept it in a container of water for almost a 100 years and when tested it still worked fine."
Bullseye has been in production since the very late 1800s, IIRC. It was one of the first non-bulk smokeless powders suitable for use in a wide range of handgun cartridges.
Unique has been with us since just after WW I.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.