Jinx-) ........
Whenever I hunt in cold weather, I Never carry the same ammunition on more than one trip to the field if it can possibly be avoided. The main thing I've seen cause primers go bad is condensation.
Moisture caused by condensation is the worst, and it can destroy your ammo very quickly. Most of us have been on hunting trips where we never take a shot. When this ammo is stored, it gets carried on hunts again and again. Hunting ammunition is quite different from target ammunition, and it's often used in cold weather. When your ammo goes bad, there's rarely any visible sign of deterioration. Most hunting trips today are quite expensive, and it's a shame to risk hearing a "click" when you finally get the chance to pull the trigger.
- Innovative