I have been keeping my pistol and a loaded mag (in a seperate locked compartment) in my truck for the past week while I am at work. Im keeping it in there because I feel safer than if it was at the house. My question is will the heat hurt the powder in the rounds? It is already getting well over 100 degrees and my truck is dark grey with a black interior so it gets stupid hot inside. I know that it is not enough to set off the rounds but will heat cycles be enough to degrade the powder?