But how long does .22 rimfire last before it starts to degrade? There has not been much systematic long-term storage testing of .22 rimfire. It tends to be used as an expendable item. Some people have found an old box or two of ammunition and checked it for viability.
Monday, September 20, 2021
Shelf Life of .22 Rimfire Ammunition: Test of 65+ Year Old Ammo
U.S.A. –-(AmmoLand.com)- How long can ammunition be stored before it degrades? Much depends on the storage conditions. With reasonable care, ammunition has a shelf life of many decades, as verified by tests done with military centerfire cartridges.
