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headspace
(redirected from Headspacing)

    Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
headspace [′hed‚spās]
(ordnance)
Distance between the face of the locked bolt or breechblock of a gun and some specified point in the chamber; in guns using rimless bottlenecked cartridges, the space between the boltface and a specified point on the shoulder of the cartridge.
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It delivers a 500-grain bullet at 2,250 fps, in a cartridge with no pressure problems, that feeds and extracts easily every time, and marries the advantages of a straight case to the benefits of headspacing on the belt, heading off any potential problems with a rim.
Belt up! A shooter's top 10: the best belted rifle cartridges ever ... by Wieland, Terry / Guns & Ammo
This is a must before headspacing because if the barrel isn't completely screwed in you'll get bad headspacing.
Look for barrel extension cracks by PS, the Preventive Maintenance Monthly
According to Winchester, their engineers designed the WSSM case without a belt to improve accuracy by headspacing off the shoulder.
Winchester Ammunition. (2003 New Products: Ammo and Reloading) by Thurman, Russ; Carlson, Ed / Shooting Industry
 
 
 
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