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Rifles, Reloading, Optics, Equipment
Reloading
Polishing a body die?
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<blockquote data-quote="Innovative" data-source="post: 837227" data-attributes="member: 527"><p>Bart B ......</p><p> </p><p>Most of your testing is accurate.</p><p> </p><p>However, I believe it would take extreme testing and a very long chapter to explain why your logical theory isn't 100% accurate. The extreme quickness of a round firing and its tight grip against the chamber wall puts far less force against the face of your bolt than most shooters might think.</p><p> </p><p>Extreme low pressure rounds are forced forward more due to the detonating of the primer than firing pin inertia. Fired cases can actually get shorter, but in my experience, that's mainly because of chamber diameter being wide enough (compared to your case) to draw the brass deeper inside the chamber. </p><p> </p><div style="text-align: center"><img src="http://www.larrywillis.com/caution.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></div><p></p><p>This picture (from my website <a href="http://www.larrywillis.com" target="_blank">www.larrywillis.com</a>) shows a 300 Win Mag case that was <strong><u>accidentally</u></strong> fired in a 300 Weatherby rifle. In this extreme situation, that shows the case length shorter than before it was fired. </p><p> </p><p>The variation in case diameter vs chamber diameter doesn't need to be this extreme to create shorter fired cases. If resizing is done accurately, fired cases usually get longer.</p></blockquote><p></p>
[QUOTE="Innovative, post: 837227, member: 527"] Bart B ...... Most of your testing is accurate. However, I believe it would take extreme testing and a very long chapter to explain why your logical theory isn't 100% accurate. The extreme quickness of a round firing and its tight grip against the chamber wall puts far less force against the face of your bolt than most shooters might think. Extreme low pressure rounds are forced forward more due to the detonating of the primer than firing pin inertia. Fired cases can actually get shorter, but in my experience, that's mainly because of chamber diameter being wide enough (compared to your case) to draw the brass deeper inside the chamber. [CENTER][IMG]http://www.larrywillis.com/caution.jpg[/IMG][/CENTER] This picture (from my website [URL="http://www.larrywillis.com"]www.larrywillis.com[/URL]) shows a 300 Win Mag case that was [B][U]accidentally[/U][/B] fired in a 300 Weatherby rifle. In this extreme situation, that shows the case length shorter than before it was fired. The variation in case diameter vs chamber diameter doesn't need to be this extreme to create shorter fired cases. If resizing is done accurately, fired cases usually get longer. [/QUOTE]
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Polishing a body die?
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