I reload in a 12x16 machine shop/building I have built recently behind my house. This is going to be my first Alabama summer in this building, which is ONLY air conditioned while I am out there (or would cost a fortune!) As the summer temps will no doubt climb to 100-110 in the shop when I am not there, is this hot enough to be a concern with smokeless powder and primers?
I keep both in seperate expandable military storage wood boxes with about three pounds of powder and 800 primers at any one time.

Does anybody think this is dangerous, or should I move my stuff inside the house during these summer months? I have searched all over and cannot find data on what temp will cause powder to ignite.

Comments? Thanks!

While you would ideally prefer to store your powder and primers at an even 72 F and 50% humidity or some such, I have experienced no problems with components stored in un-heated or cooled buildings for years at a time. Bruce Hodgdon stored much of his surplus powder in grain elevators and rail cars in the early years.

There is no danger of ignition from normal environmental temperatures, and I am more suspect of varying humidity being a cause of degradation than high temperature.

The small quantities you intend to store would present no physical problem in moving into the house; what kind of problem your spouse might present is beyond my speculation.

Thanks! I don't worry too much about our HIGH summer humidity as I keep the bottles closed and use it up pretty fast (a pound every two weeks).

I might move them indoors in august as what "honey-bunny" does not know, won't hurt her (and neither of us smoke anymore).

Thanks...