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Hunting
Long Range Hunting & Shooting
Is 7mm SST the perfect cartridge for me?
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<blockquote data-quote="yorke-1" data-source="post: 1607073" data-attributes="member: 11960"><p>I personally don't like 40° shoulders on mag fed chamberings in a push feed action unless the gun is using a centerfeed style magazine. They work fine but the feeding isn't very smooth in my experience. In a true controlled round feed like a Winchester, Ruger 77 or my current favorites, the Mausingfield and Nucleus actions, I haven't had an issue with them. I doubt that if you have two cases with identical capacity but one has a 40° shoulder and the other has a 30° and you loaded them to identical chamber pressures, you'd ever have a meaningful difference in velocity between the two. Case design can help hide the typical signs of case pressure like bolt lift or flattened primers, but that doesn't mean the pressure isn't there. That's why you sometimes see higher velocities from cases with sharper shoulders.</p><p></p><p>I don't think there's going to be a huge difference at 600 yards on game between a 6.5 PRC or one of the 7mm short mags. A good quality 140gr bullet in the 6.5 will kill an elk just as well as a good quality 180gr bullet from a 7mm with the same shot placement. There's a theoretical advantage for the 7mm but there's plenty of actual first hand data from folks using the 6.5 to prove that it's more than capable of killing elk at 600 yards.</p></blockquote><p></p>
[QUOTE="yorke-1, post: 1607073, member: 11960"] I personally don't like 40° shoulders on mag fed chamberings in a push feed action unless the gun is using a centerfeed style magazine. They work fine but the feeding isn't very smooth in my experience. In a true controlled round feed like a Winchester, Ruger 77 or my current favorites, the Mausingfield and Nucleus actions, I haven't had an issue with them. I doubt that if you have two cases with identical capacity but one has a 40° shoulder and the other has a 30° and you loaded them to identical chamber pressures, you'd ever have a meaningful difference in velocity between the two. Case design can help hide the typical signs of case pressure like bolt lift or flattened primers, but that doesn't mean the pressure isn't there. That's why you sometimes see higher velocities from cases with sharper shoulders. I don't think there's going to be a huge difference at 600 yards on game between a 6.5 PRC or one of the 7mm short mags. A good quality 140gr bullet in the 6.5 will kill an elk just as well as a good quality 180gr bullet from a 7mm with the same shot placement. There's a theoretical advantage for the 7mm but there's plenty of actual first hand data from folks using the 6.5 to prove that it's more than capable of killing elk at 600 yards. [/QUOTE]
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Is 7mm SST the perfect cartridge for me?
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