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Rifles, Reloading, Optics, Equipment
Reloading
Bullet Sorting Question
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<blockquote data-quote="Boss Hoss" data-source="post: 551191" data-attributes="member: 5060"><p>The reason that measuring the bearing surface is important is that is what determines the pressure in the chamber when the bullet enters the barrel. The pressure curve also determines the ultimate velocity so at 1K which is the rang I compete this is important. Variations in velocity are significant because it causes vertical dispersion which makes the difference between winning and losing. Additionally, pointing up the bullet will eliminate any yaw that would be imposed by small deformations at the tip of in my case the 142 SMK. </p><p></p><p>There are many other things that are done such as verifying concentricity but I will say that on a factory rifle depending on the way that it was built may or may not be able to fully take advantage of these actions. To equate any of these actions as a standalone to a specific accuracy gain is problematic however, for example when testing velocities after sorting bullets I had almost a 25% decrease in velocity variations compared to using the bullets that were not sorted. First and foremost the shooters equipment, process and technique must be refined to the point where he or she can properly determine what difference if any these modifications will make. </p><p></p><p>In the end by reducing variables in any process which shooting is a great example the more consistent the process is performed the more repeatable your results will be.</p></blockquote><p></p>
[QUOTE="Boss Hoss, post: 551191, member: 5060"] The reason that measuring the bearing surface is important is that is what determines the pressure in the chamber when the bullet enters the barrel. The pressure curve also determines the ultimate velocity so at 1K which is the rang I compete this is important. Variations in velocity are significant because it causes vertical dispersion which makes the difference between winning and losing. Additionally, pointing up the bullet will eliminate any yaw that would be imposed by small deformations at the tip of in my case the 142 SMK. There are many other things that are done such as verifying concentricity but I will say that on a factory rifle depending on the way that it was built may or may not be able to fully take advantage of these actions. To equate any of these actions as a standalone to a specific accuracy gain is problematic however, for example when testing velocities after sorting bullets I had almost a 25% decrease in velocity variations compared to using the bullets that were not sorted. First and foremost the shooters equipment, process and technique must be refined to the point where he or she can properly determine what difference if any these modifications will make. In the end by reducing variables in any process which shooting is a great example the more consistent the process is performed the more repeatable your results will be. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Bullet Sorting Question
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