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Discussion Starter #1
Going through some ammo cans in my garage where I had "archived" some reloading supplies. Opened up one can, and there I had 5000 Winchester large Pistol Primers I purchased in 1991. They still look like new - I am assuming still good to go.

Question - how long do unloaded primers last?
 

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If your garage is like my garage, then you may have a problem. Big swings in temperature and humidity for several years won't do them any good. I'd try priming some cases and firing just the primers. If a reasonable sized sample goes bang-- with no exceptions-- then I'd load some plinking ammo with them. I assume these primers are still in the original boxes and not loose in jars or some other hazardous form of storage.
 

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Discussion Starter #4
They sat in a closed ammo box, so humidity is not a big factor, however, in Nebraka, the temps can vary form 0 to 90 in the garage. Will give them a try though
 
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