The 22LR Cartridge
I understand that centerfire pistol cartridges will last a very long time if kept in a cool dry environment. I've recently shot .357 Mag & .45 ACP from the late 80's and they were fine, albeit a little smokey.
So, given that the 22LR cartridge uses a heel bullet; how many years would a 22LR cartridge hold up in a similar cool/dry environment? The first part that would probably go bad would be the bullet if it was uncoated lead. But how about copper coated 22LR's?
"You haven't lived until you've died." - various