You know I'm not rich or anything, (I work in Public schools), but primers are so cheap that to me, they aren't worth the risk to use them. I just threw away a couple of hundred primers last week. They were only three years old, but I don't think they are worth the trouble. Besides, it was fun to hear them cooking off in the burn-barrel. (about ten at a time)
I would hate to have the buck of my dreams to run off because of trying to save 2 or 3 cents.