UtahRob

Where you live - i would not even worry about it. I live north of you and have never had any problems at all. T7 will absorb moisture but nothing like Pyro or real BP, in fact T7 has a clear coating on it that helps resist moisture. That is also why it needs more heat to ignite it. Some time just for an experiment, put some cold water in a small open container. Then gently pour in a partial spoon full of T7 - I will sink right to the bottom form an inverted cone and it will remain in that cone unitl it is is agitated, if you were to do the same thing with real BP or Pyro - you would produce a black sludge. If you had the time to wait for the water to evaporate and the powder to dry - you could shoot it..