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Rifles, Reloading, Optics, Equipment
Reloading
Velocity troubles with 7mm mag
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<blockquote data-quote="bigedp51" data-source="post: 1581403" data-attributes="member: 28965"><p>Below with the top .223/5.56 case on the chart at 30.6 case capacity and the bottom case with 28.0 case capacity you can have over 5,000 psi difference in chamber pressure with the same powder charge.</p><p></p><p><img src="https://i.imgur.com/LjAQ7L9.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Quickload tells you to get the case capacity from a case fired in "YOUR" rifle for its pressure and velocity data.</p><p></p><p>NOTE, the larger the case capacity of a given caliber the less effect it will have on the chamber pressure reading. And due to the thickness and hardness of the cases by manufacture the chamber pressures and velocities can vary until the case is fire formed to your chamber.</p><p></p><p>So the case capacity will have more effect with a small .22 Hornet case than much larger magnum type cases.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1581403, member: 28965"] Below with the top .223/5.56 case on the chart at 30.6 case capacity and the bottom case with 28.0 case capacity you can have over 5,000 psi difference in chamber pressure with the same powder charge. [IMG]https://i.imgur.com/LjAQ7L9.jpg[/IMG] Quickload tells you to get the case capacity from a case fired in "YOUR" rifle for its pressure and velocity data. NOTE, the larger the case capacity of a given caliber the less effect it will have on the chamber pressure reading. And due to the thickness and hardness of the cases by manufacture the chamber pressures and velocities can vary until the case is fire formed to your chamber. So the case capacity will have more effect with a small .22 Hornet case than much larger magnum type cases. [/QUOTE]
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Velocity troubles with 7mm mag
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