How should I store my primers to maintain their quality and longevity? Primers should be stored in a cool, dry place away from direct sunlight and moisture. Ideally, they should be kept in an ammunition cabinet or storage box designed to limit temperature fluctuations and humidity. Avoid storing primers near chemicals or volatile substances. It's also important to keep them in their original packaging to protect them from environmental factors and physical damage. Proper storage will help maintain their performance and reliability over time.