Defensive Round reliability after cycling out

I live in the sun scorched Southwestern US. I leave my ccw in the glove box due to workplace requirements. Extreme heat will reduce the reliability of the rounds, so I plan to cycle them out and expend the old rounds at the range. My questions are for those who cycle out rounds after 6 / 12 months / whenever:Please describe the extremes your gun encounters on average (such as in glove box of car in hot / cold / humid conditions)What brand / load of defensive rounds do you carry?How often do you cycle out defensive rounds?How reliable are the old rounds when you expend them?Thank you for your input. via /r/CCW https://ift.tt/3xoMCdf