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Old April 3, 2012, 08:46 PM   #19
Jim Watson
Senior Member
Join Date: October 25, 2001
Location: Alabama
Posts: 14,155
in a balloon head case
Actually in a folded head case or, for military ammunition, in a Benet inside primed centerfire case. There was a LOT of development done in ammunition design in those days, with construction that looks strange now.
What we now call a balloon head case was originally listed by UMC as "solid head" because the rim was a solid flange instead of folded and rolled like a rimfire, even though the primer pocket still protruded into the powder space.
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