Like stated above, shoot it for practice, and remedy drill make you better firearm handler.
A lot of the hunting shotshells are advertised water resistant, as half the time you go out in the field it is going to rain on you anyway, and if duck/goose huntin, there is bound to be moisture involved.
Send me them 2 boxes of USA9MMVP, and the 2 boxes of 40 S&W, I'll take of them for you.