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Belted mag caliber & chamber support ?

AR15KittyKat

Private
Full Member
Minuteman
Jul 11, 2007
44
0
TX
Never owned a belted magnum, but thinking of getting a 300WM, does the barrels's chamber support up to & stops at the belt of the round, or does the chamber actually supports the whole belt also?
 
Re: Belted mag caliber & chamber support ?

The belt but obviously not the rim and extractor grove, which is never supported
as they are both in the primer pocket surround.
 
Re: Belted mag caliber & chamber support ?

The belt is where head space is set so the belt will be supported all the way around the chamber.