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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Long bullets seated deep into short mag brass, effect on accuracy????
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<blockquote data-quote="cdherman" data-source="post: 562589" data-attributes="member: 12282"><p>The magazine and ejection port issues are easy to figure out. I am mainly concerned with theoretical issues when the bullet is seated deep down in the case.</p><p> </p><p>You mention not FL sizing -- is that because the neck would have too much bearing surface on the bullet? What would that cause? Too much pressure? Uneven release of the bullet?</p><p> </p><p>As for the chamber neck and throat -- the throat to the rifling will be custom, based on a dummy cartridge. So I can at least theoretically seat the bullets deep into the case so that I can use the magazine, and then have the throat cut short.</p><p> </p><p>This would potentially be one of those "designed for one bullet only" guns. But given that it will never see factory ammo, I see no problem with that.</p><p> </p><p>I am inclined towards the 7mm SAUM -- its actually a tad shorter since apparently the Rem SA is also a tad shorter than the Winchester SA that the WSM was designed for. With the 7mm RSAUM, I would have a little longer neck and a little less case capacity. Probably lose a little velocity, but make up for it in consistency.</p><p> </p><p>The added downfield speed due to superior BC makes even a slow 7mm look fine, so long as the accuracy is there. Shots over 300 yards pretty much require turret corrections regardless, so what's a 100 fps in the end, so long as its a tack driver shooting a great bullet.....</p></blockquote><p></p>
[QUOTE="cdherman, post: 562589, member: 12282"] The magazine and ejection port issues are easy to figure out. I am mainly concerned with theoretical issues when the bullet is seated deep down in the case. You mention not FL sizing -- is that because the neck would have too much bearing surface on the bullet? What would that cause? Too much pressure? Uneven release of the bullet? As for the chamber neck and throat -- the throat to the rifling will be custom, based on a dummy cartridge. So I can at least theoretically seat the bullets deep into the case so that I can use the magazine, and then have the throat cut short. This would potentially be one of those "designed for one bullet only" guns. But given that it will never see factory ammo, I see no problem with that. I am inclined towards the 7mm SAUM -- its actually a tad shorter since apparently the Rem SA is also a tad shorter than the Winchester SA that the WSM was designed for. With the 7mm RSAUM, I would have a little longer neck and a little less case capacity. Probably lose a little velocity, but make up for it in consistency. The added downfield speed due to superior BC makes even a slow 7mm look fine, so long as the accuracy is there. Shots over 300 yards pretty much require turret corrections regardless, so what's a 100 fps in the end, so long as its a tack driver shooting a great bullet..... [/QUOTE]
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Long bullets seated deep into short mag brass, effect on accuracy????
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