Mine are on a shelf, buddy gave me a brick(1000) of Federal LR primers, price marked 17.99. They still make for very accurate loads in a variety of rifles, he lived in an old farm house. More temp/humidity change in his house than mine. I purchased some(brick of 1000) old Win LRM primers at a gun show, the outer box had light water staining. They run with new primers both in group size and chronograph numbers in belted mag with ball powder. Primers are tough to kill. Keep them dry and room temp.