i would never store a mag in the oven, now the microwave on the other hand is where i keep all my spare ammo. if the bullet dont get'em the radiation will.*
*disclaimer- i do not store any ammo in my microwave. the above reference was a joke, and only a joke. any atempt to store ammo in a microwave could cause sudden death, disfigurement, and most likely a worse case of the stupids than you already had for trying it.