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Aus 223 and 7.62 Mil are neck annealed too. I tried it once with a blow-torch with the little 222 cases stood up in a water tub, heated to cherry red and then knocked over with a hiss into the cold water.
It was not successful(probably my fault as the cases were well past their useful life for competition) -I would not want to do it again !
Annealing the whole case (I feel) would not be advisable - as uniformity and primer retention may be a safety issue ?
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