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Rifles, Reloading, Optics, Equipment
Reloading
Resizing reamer Specs
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<blockquote data-quote="ntsqd" data-source="post: 1988504" data-attributes="member: 93138"><p>I know next to nothing of internal ballistics, but I do think that there is a sliver of time immediately after firing pin contact with the primer where the pressure rise is low. It isn't until the bullet has started to engage the rifling that there is enough resistance to bullet motion for the pressure to really ramp up. Something has to hold the bullet in the correct alignment during that admittedly very small fraction of time.</p><p></p><p>For me that has long meant that the case base and the case neck needed to be a good fit in the chamber. I do not see the section of the case between the datum line and roughly where the belt would be if the case were a belted mag case as all that important to this alignment UNLESS one or the other ends is not doing it's job.</p><p></p><p>Kent Duckworth, the "worth" of Cosworth Racing Engines, is famously quoted to have said "Don't read, you become mis-informed." But how many of us can afford the time and money that it would take to develop ALL of this on our own?</p></blockquote><p></p>
[QUOTE="ntsqd, post: 1988504, member: 93138"] I know next to nothing of internal ballistics, but I do think that there is a sliver of time immediately after firing pin contact with the primer where the pressure rise is low. It isn't until the bullet has started to engage the rifling that there is enough resistance to bullet motion for the pressure to really ramp up. Something has to hold the bullet in the correct alignment during that admittedly very small fraction of time. For me that has long meant that the case base and the case neck needed to be a good fit in the chamber. I do not see the section of the case between the datum line and roughly where the belt would be if the case were a belted mag case as all that important to this alignment UNLESS one or the other ends is not doing it's job. Kent Duckworth, the "worth" of Cosworth Racing Engines, is famously quoted to have said "Don't read, you become mis-informed." But how many of us can afford the time and money that it would take to develop ALL of this on our own? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
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