Heat and loaded weapons

[Rabid Rich]

Okay,
I am living in Arizona for a while yet with some record breaking heat going on. I pack a loaded pistola everywhere I go in my vehicle. The heat inside the vehicle sometimes registers in excess of 116 to ??? I took the weapon out to check it and it was literally "too-hot-to-handle"... REALLY!!!!!
Question......What does that do anything to the cartridges? I have a friend that had some rifle shells exposed to high heat due to a fire in his home. When fired they locked the bolt on his .270. (Would hate to wear a hammer between the ears...)
So, anyone have any thoughts or experience on this subject?
Lots of solutions come to mind as Ariz, is a great state and recognizes my CCW from Colo.
Guess I just would like the thoughts of you fellers..................

[Ol` Joe]

High temps can cause high pressures with some powders, but the problem goes away once the ammo cools. The only way I know to determin if the weather is affecting your ammo is to try shooting in it....I doubt factory stuff unless possibly +P will offer much trouble though.

[GoodOlBoy]

I live in Texas. I have had my handgun stored in 120F (outside temp) vehicle parked in the sun. I have fired the ammo afterwards with no issues. That being said, I never load +p ammo in my carry weapons. I dont know how it would react.

GoodOlBoy

[buckhunter]

My understand even if the inside of vehicle is hot avoid placing ammo in direct sunlight like on a dash board. It should be fine to shoot otherwise. Don't know where you store it in your vehicle but try the glove box or console if your not already.