Board Thread:General Nerf discussion/@comment-27125665-20191218124759/@comment-27306930-20191218224955

UPDATE: Constant-Force springs like the ones Hasbro uses in Nerf drums can wear out, especially if you store darts in them for long periods of time. These types of springs are made of flat spring steel strips which have very different properties than coiled springs which are made of annealed wire. They are prone to losing their elasticity when extended for prolonged periods. Even when used properly, they sometimes slowly weaken over time and can crap out.

So to maintain maximum performance from your Nerf drums, always take the darts out and store them empty. If you need a new one, head over to FoamBlast for a  Replacement Spring