water and freezing temps will foul any gun. Point there, don't get it wet and then let it freeze. I'd think that would be my conclusion before I'd do any testing... and it would eliminate the need for tests, simply by coming to a conclusion.
True, but...have you ever gotten wet in the woods when it rains? Did you try to stay dry but still fail?
I don't have to do an experiment to know that I am colder when it is wet, but it is a bit trite to simply suggest 'don't get wet'. To liken it to clothing, I would rather know that a wool jacket will keep me warmer than a down when I am wet. I still try like hell to stay dry, but sometimes that doesn't work. It is good to know if your gear will work under adverse conditions, don't you think?