Quote:
Does the work hardned necks, plus summer heat/winter cold, plus 20 years of age equate to some referance that I have not read?
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Given I'm shooting HXP vintage 68/70/72 with no problems at all, I don't believe you're experiencing any
inherent effects of a storage problem on good brass aging. (And I'm also shooting some 243Win/7mm BR that I loaded in 1989 with no problem as well.) Moreover, two moderate-pressure reloadings shouldn't work-harden anything to the extent that things come apart on you as you described.
You ARE, however, looking at badly anealed brass coming out of the [Federal] factory in my opinion, that moderate aging took over the hill. The solution isn't pretty.