Old Vintage .22 Ammo - Is It Any Good?

About a year or so ago, I loaded my Ruger 10/22 rifle with some .22 caliber ammo that I bought years ago.

I just grabbed a box of .22 one morning and headed out to the range with the guys. I noticed that there was some corrosion on the surface of the bullets. The ammo was bought in the 1980s. I loaded up a magazine with them and started shooting.

Well, needless to say, most fired fine but a couple didn't. It was then I decided to go through all of my .22 ammo and discarded ones that had some corrosion. It amounted to two small boxes that needed discarding. All the rest looked just fine.

The following video by Cumberland Outdoorsman asks if old vintage .22 ammunition is any good. 

The summary:

Many shooters and sportsmen have a good supply of .22 rimfire ammo on hand. Much of that ammo is stored away for years, even decades. In this video I will be looking into some old .22 ammo, and if it is still viable. Will it even still fire after 30, 40 or 50 years, and will it still perform as accurately as new ammo? Come along and lets go to my shooting range and find out if and how well vintage .22 ammo can perform.