As long as it has been kept dry as the container you mentioned I am sure it is still very good. I have shot 30+ year old ammunition with no problem at all. But always kept it dry and not exposed to excessive heat. So go shooting and have fun!
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
America will never be destroyed from the outside. If we falter and lose our freedoms, it will be because we destroyed ourselves.
Not to hijack the thread but are there any torture tests on ammo to show at what point it will become less reliable or stop working completely? It seems like ammo is good for a long time even in crappy conditions.