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Rifles, Reloading, Optics, Equipment
Reloading
Is the 300 wsm case somewhat magical?
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<blockquote data-quote="MagnumManiac" data-source="post: 260863" data-attributes="member: 10755"><p>All of the major ammo brands are publishing the same velocity for both cartridges because that is what they want you to believe, if you look back before the WSM came about, Winchester ammo was loaded to 3090fps with a 180gr bullet, it has since been downloaded to be no faster than the WSM, if this is not HYPE, I don't know what is.</p><p>Why is it delusional to believe that, grain for grain, the difference in velocity is proportional, my understanding is that a reduction of powder of 10% will have a 2% reduction in velocity, which I have tested to be true about 90% of the time, exactly where the 300WSM lies against the 300WM cartridge, there is no substitute for more cubic inches or more case capacity, physics doesn't lie.</p><p></p><p>I agree that the WSM cases are efficient, but not in a manner that makes them burn less powder and magically get higher velocities than a case that burns more powder. Who can prove that the 300WM is less efficient than the 300WSM when compared against case expansion ratio's?</p><p>It just simply isn't true, and cannot be proved in the real world.</p><p></p><p>There used to be a thing called "overbore capacity", this doesn't cut it anymore with the very slow powders that we have on offer, with the exception of the 7mm RUM. </p><p>Food for thought.</p><p>MagnumManiac.</p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 260863, member: 10755"] All of the major ammo brands are publishing the same velocity for both cartridges because that is what they want you to believe, if you look back before the WSM came about, Winchester ammo was loaded to 3090fps with a 180gr bullet, it has since been downloaded to be no faster than the WSM, if this is not HYPE, I don't know what is. Why is it delusional to believe that, grain for grain, the difference in velocity is proportional, my understanding is that a reduction of powder of 10% will have a 2% reduction in velocity, which I have tested to be true about 90% of the time, exactly where the 300WSM lies against the 300WM cartridge, there is no substitute for more cubic inches or more case capacity, physics doesn't lie. I agree that the WSM cases are efficient, but not in a manner that makes them burn less powder and magically get higher velocities than a case that burns more powder. Who can prove that the 300WM is less efficient than the 300WSM when compared against case expansion ratio's? It just simply isn't true, and cannot be proved in the real world. There used to be a thing called "overbore capacity", this doesn't cut it anymore with the very slow powders that we have on offer, with the exception of the 7mm RUM. Food for thought. MagnumManiac. gun) [/QUOTE]
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Is the 300 wsm case somewhat magical?
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