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Old July 25, 2021, 05:08 PM   #4
Join Date: March 4, 2005
Location: Ohio
Posts: 19,987
The military sees it the other way around. They put a stockpile limit of 45 years on single-base powder munitions and 20 years on their double-base powder munitions. However, which will actually last longer depends on what else was used in formulating the powder. Some of the deterioration in modern double-base powders is of the deterrents, so the burn rate can go up when they get too old, making the powder dangerous. On the other hand, Alliant still has a sample of an early lot of Unique that is over a century old that is still good. It is, however, stored underwater, something that cannot be done with some of the more modern chemistries, and something that helps carry off acid radicals. They pull a sample and dry it out every now and then to confirm that it is still working.
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