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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
magnum vs. short magnum
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<blockquote data-quote="LouBoyd" data-source="post: 370339" data-attributes="member: 9253"><p>The 300 Win Mag has 95 grains case capacity at 4300 atmospheres. the 300 WSM has 81.3 grains case capacity at 4450 BAR. </p><p></p><p>95* 4.3 = 408.5 </p><p>81.3 *4.45 = 361.8 </p><p></p><p>Within SAAMI specs the WSM cannot drive the same bullet as fast as the 300 WM.</p><p>If loaded to the same velocity the 300 WSM may have a little less recoil because the smaller case at higher pressure will have a little less powder mass and powder mass adds to recoil. However with the same barrel the WSM rifle may be a bit lighter if it has a shorter action which will add to the recoil. Without knowing all of the details of the rifes and the loads used (which will be different) the higher recoil could be with either rifle. </p><p></p><p>In my opinion most of the advantages of the 300 WSM are lost because the manufacturers insist on putting them in their short action rifles. I've purchased several 300 WMs and no 300 WSMs even when both were available. My decision was always based on the fact that the 300 WM in a long action gave more space for long heavy bullets than the WSM in a short action. If Winchester sold the 300 WSM with a medium length (3.4") action like the pre-64's I'd buy it, but not in a 2.8 to 2.9" short magazine.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 370339, member: 9253"] The 300 Win Mag has 95 grains case capacity at 4300 atmospheres. the 300 WSM has 81.3 grains case capacity at 4450 BAR. 95* 4.3 = 408.5 81.3 *4.45 = 361.8 Within SAAMI specs the WSM cannot drive the same bullet as fast as the 300 WM. If loaded to the same velocity the 300 WSM may have a little less recoil because the smaller case at higher pressure will have a little less powder mass and powder mass adds to recoil. However with the same barrel the WSM rifle may be a bit lighter if it has a shorter action which will add to the recoil. Without knowing all of the details of the rifes and the loads used (which will be different) the higher recoil could be with either rifle. In my opinion most of the advantages of the 300 WSM are lost because the manufacturers insist on putting them in their short action rifles. I've purchased several 300 WMs and no 300 WSMs even when both were available. My decision was always based on the fact that the 300 WM in a long action gave more space for long heavy bullets than the WSM in a short action. If Winchester sold the 300 WSM with a medium length (3.4") action like the pre-64's I'd buy it, but not in a 2.8 to 2.9" short magazine. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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magnum vs. short magnum
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