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Rifles, Reloading, Optics, Equipment
Reloading
300 Win Mag Headspace
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<blockquote data-quote="bigedp51" data-source="post: 1487998" data-attributes="member: 28965"><p>You still didn't explain why a belted case is so special that head clearance and fire forming is not required.</p><p></p><p>It doesn't matter what stops the forward movement of the case in the chamber as a headspacing method. It is the head clearance or air space between the rear of the case and the bolt face that allows the case to stretch and thin when fired.</p><p></p><p>And this is the very reason on a belted case you let the case headspace on its shoulder and not the belt. And with variations in case manufacture you could have as much as .012 head clearance.</p><p></p><p><img src="https://i.imgur.com/sHgqVJR.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Bottom line, just because a case has a belt doesn't mean it will not stretch, thin and cause case head separations.</p><p></p><p><img src="https://i132.photobucket.com/albums/q25/redrider02/20140425_023345_2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1487998, member: 28965"] You still didn't explain why a belted case is so special that head clearance and fire forming is not required. It doesn't matter what stops the forward movement of the case in the chamber as a headspacing method. It is the head clearance or air space between the rear of the case and the bolt face that allows the case to stretch and thin when fired. And this is the very reason on a belted case you let the case headspace on its shoulder and not the belt. And with variations in case manufacture you could have as much as .012 head clearance. [IMG]https://i.imgur.com/sHgqVJR.gif[/IMG] Bottom line, just because a case has a belt doesn't mean it will not stretch, thin and cause case head separations. [IMG]https://i132.photobucket.com/albums/q25/redrider02/20140425_023345_2.jpg[/IMG] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 Win Mag Headspace
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