What principle should be used to rotate ammo stock to prevent aging?

• A. Last-In, First-Out (LIFO) principles.
• B. First-In, Last-Out (FILO).
• C. First-In, First-Out (FIFO) principles where feasible to prevent aging, degradation, and reliability issues.
• D. Randomized retrieval regardless of purchase date.

Answer: (C)

The main idea is to manage ammo by using the oldest stock first to prevent aging from affecting performance. Using the oldest rounds before newer ones minimizes the time any given cartridge sits in storage, reducing exposure to environmental factors that can degrade powder, primers, and casings. This helps maintain reliability and consistency, since aging can lead to slower or inconsistent burn, corrosion, or other degradation that affects performance. FIFO is the standard approach because it systematically exercises the oldest stock first, where feasible, so shelf life is respected and/ or extended periods of storage don’t compromise reliability. In contrast, methods that keep older stock in reserve longer or ignore purchase dates can allow aging effects to accumulate, increasing the risk of malfunction. Randomized retrieval offers no protection against aging and can lead to unpredictable results.