These white boxed silver coloured primers pre date the faulty batch by a couple of decades. Mind you NZ retailers can be a shifty bunch. I bought Win LRP's about 3 years ago....got bolt face burns, checked the batch number ...holly shit , manufactured in 2008! (Thanks GC)
That is information you don't see until you open the box.
Anyway the original point was that if stored appropriately older primers can give good results still.
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