old pellets

I bought a sleeve of old H&N pellets at a show sent to H&N and they replied the pellets were made 1970 they shoot great from my FWB 600
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They may be stuck, but that is a cool looking tin!

Are you able to tell us if anything has changed from the manufacturing of the old pellets versus something new?
Since then we have completely renewed the machine park. And today's match pellets don't have a ribbed skirt. Unfortunately, I can't say anything about the lead alloy we used in the 70s.