Pglasgow

In this particular case this gun was loaded in the house with warm powder 68f, the hunidity in the house runs at 50% (actually 46%) when the gun was loaded. The powder was in my in my range box sitting on the floor in the rec-room, probabably had been there a week or so before that spent all hunting season the the back seat of the truck.

When the gun was loaded a muzzle mitt and a dead 209 primer were loaded and it went directly outside to 32F degrees67% humidity from there you can follow the test

I like you, I think, believe humidity was the big point - not condensation... Although all the days the gun was outside it was 70+% humidity. One other factor I am not sure about is the failure of T7 powder to deform - enlarge - melt - or what ever in water. If the water was turbulant it sertainly would but just poured in water it maintains it shape and looks like a pile of T7 granuales even after 24 hours. I wonder - and certainly do not know is it coated with something that is some what impervious to humidity?????? Why does it stay together and hold it's shape?????

Do you have any black powder? and/or Pyro? - if you do ran this experiment for me.... 3/4 onces of warm water in a container - drop in 1/2 teaspoon of powder - let the whole thing sit without disturbance for a few hours and tell what you have. T7 after this long did retain its' shape but any distrubance of the water would certainly cause it turn disineigrate and turn the water black...

just thinking - and I know that's bad....