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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth question!
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<blockquote data-quote="C Harrison" data-source="post: 1016973" data-attributes="member: 76871"><p>The bullet is pushed into the lands from the force of the primer, then stops at the lands until the charge is ignited. Seating the bullet further into the case reduces pressure in a sense. What really happens is that there are several pressure impulses throughout the firing cycle. The initial force from the primer moving the bullet into the lands before the powder charge begins to expand serves to the lengthen the pressure curve of the primer blast. As the charge ignites, the bullet is pressed forward into the barrel, etc. When we set the bullet to the lands, the primer blast combined with the charge igniting increases the pressure spike resulting in higher pressure from the resistance between the copper and the steel barrel lands. </p><p></p><p><a href="http://www.dtic.mil/dtic/tr/fulltext/u2/462060.pdf" target="_blank">http://www.dtic.mil/dtic/tr/fulltext/u2/462060.pdf</a></p></blockquote><p></p>
[QUOTE="C Harrison, post: 1016973, member: 76871"] The bullet is pushed into the lands from the force of the primer, then stops at the lands until the charge is ignited. Seating the bullet further into the case reduces pressure in a sense. What really happens is that there are several pressure impulses throughout the firing cycle. The initial force from the primer moving the bullet into the lands before the powder charge begins to expand serves to the lengthen the pressure curve of the primer blast. As the charge ignites, the bullet is pressed forward into the barrel, etc. When we set the bullet to the lands, the primer blast combined with the charge igniting increases the pressure spike resulting in higher pressure from the resistance between the copper and the steel barrel lands. [url]http://www.dtic.mil/dtic/tr/fulltext/u2/462060.pdf[/url] [/QUOTE]
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Reloading
Seating depth question!
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