Thread: Headspace
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Old December 28, 2018, 11:12 PM   #5
mehavey
Senior Member
 
Join Date: June 17, 2010
Location: Virginia
Posts: 5,259
The "head"space originally applied to rimmed cartridges, and was literally the clearance dimension for [drumroll please] the case head.
See http://www.nucem.se/images/guns/hand...574570head.gif

Then we invented modern rimless cases and messed everything up .. . .
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