You can read many posts on this and other forums from folks who ran across BP weapons that had lane dormant for dozens of years. The person finding the weapon also found, much to his or her dismay, that the weapon was loaded.
Probably someone will respond whith their own personal story. It has never happened to me but I think others on the forum may have something to add.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson