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Rifles, Reloading, Optics, Equipment
Reloading
7/300WSM Case Capacity and Forming
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<blockquote data-quote="J E Custom" data-source="post: 518850" data-attributes="member: 2736"><p>Just to clear it up. </p><p></p><p>The 7mm WSM is different than all of the other WSMs and uses it's own head space gauge.</p><p></p><p>The 300 WSM has a body length of 1.802 and the 7mm WSMs body is 1.856 (.054 longer)</p><p></p><p>The neck is shorter (.244 compared to .298 of the 300) but is not two short.</p><p></p><p>It is .020 shorter than one caliber .284. And The tried and true 300 Win Mag has a neck length</p><p>.044 shorter than the caliber (.308 ) so it has a shorter neck based on the bullet dia than the </p><p>7 WSM.</p><p></p><p>All of the WSMs are the same OAL so you can make any caliber from any of the WSM brass if </p><p>you want to go to the trouble of resizing and fireforming.</p><p></p><p>In fact , Norma makes brass for the 270 and the 300 WSM an I had thought about buying some </p><p>300 WSM Norma brass and turning the necks and sizing it to 7mm WSM then fireforming it but</p><p>the Winchester brass with careful sorting and case prep has worked very well, and the accuracy</p><p>at 100 yards with 5 shots in a sporter weight custom rifle was .174 (best) and .212 (Worst)</p><p>with a 140 Accubond @ 3307 ft/sec.</p><p></p><p>I know that the accuracy could probably be improved with a different bullet/powder combination</p><p>but For hunting It shoots as well as I can under those conditions.</p><p></p><p>If I wanted to size down I would go to the 7/08 or the 6.5x47 lapua, Both are capable 1000 yard</p><p>shooters.</p><p></p><p>Again, just an opinion.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 518850, member: 2736"] Just to clear it up. The 7mm WSM is different than all of the other WSMs and uses it's own head space gauge. The 300 WSM has a body length of 1.802 and the 7mm WSMs body is 1.856 (.054 longer) The neck is shorter (.244 compared to .298 of the 300) but is not two short. It is .020 shorter than one caliber .284. And The tried and true 300 Win Mag has a neck length .044 shorter than the caliber (.308 ) so it has a shorter neck based on the bullet dia than the 7 WSM. All of the WSMs are the same OAL so you can make any caliber from any of the WSM brass if you want to go to the trouble of resizing and fireforming. In fact , Norma makes brass for the 270 and the 300 WSM an I had thought about buying some 300 WSM Norma brass and turning the necks and sizing it to 7mm WSM then fireforming it but the Winchester brass with careful sorting and case prep has worked very well, and the accuracy at 100 yards with 5 shots in a sporter weight custom rifle was .174 (best) and .212 (Worst) with a 140 Accubond @ 3307 ft/sec. I know that the accuracy could probably be improved with a different bullet/powder combination but For hunting It shoots as well as I can under those conditions. If I wanted to size down I would go to the 7/08 or the 6.5x47 lapua, Both are capable 1000 yard shooters. Again, just an opinion. J E CUSTOM [/QUOTE]
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7/300WSM Case Capacity and Forming
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