Does leaving a magazine loaded weaken the spring?
Daniel Santos
Updated on March 05, 2026
When left loaded to full capacity and not used, most magazines will very slowly lose some amount of spring tension over time. Unfortunately, it's impossible to say with any certainty just how long it will take before the spring loses enough tension to start causing issues.
How long can you leave a magazine loaded?
By following that guide line, magazines would remain fully loaded a maximum of six months before being unloaded and reloaded. Environmental conditions of temperature, moisture, exposure to chemicals or sunlight, not to mention vibration or impact, can affect the magazine and ammunition contained within.Should you load your magazine to full capacity?
Load to 30They were designed to be fully loaded to 30 and can be loaded successfully as such. Giving up 1 or 2 rounds simply takes away from the user's capabilities and with an in-spec rifle, you should not have issues. Many feel it is important to load a standard A15 magazine to full (30 round) capacity.