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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 WIN Erratic ES, Great Accuracy???
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<blockquote data-quote="Sandwarrior" data-source="post: 321079" data-attributes="member: 19099"><p>You're just not going to see a big spread in groups until velocity and BC make a huge difference. That's beyond 300 yds. </p><p></p><p>A lot of people think it's velocity that gives the harmonic node of accuracy down the barrel. To a lesser degree it is. But the real harmonic hero/culprit is the vibration caused by the powder charge. Say you worked up a load of 54.5 gr. of H4831sc, which just happened to be in a node that ran from 54-55.5 (gr. of powder) in your rifle. There wouldn't be anything throwing that bullet off at all. The drop of 50-70 fps isn't hardly noticeable @ 100 and won't make but 2" difference @ 300. Say for instance that the accuracy node you hit happened to "spring" the bullet out of the end of the barrel (as opposed to throwing it left or right). At that point velocity won't make a difference until even further out.</p><p></p><p>-Hope that helps</p></blockquote><p></p>
[QUOTE="Sandwarrior, post: 321079, member: 19099"] You're just not going to see a big spread in groups until velocity and BC make a huge difference. That's beyond 300 yds. A lot of people think it's velocity that gives the harmonic node of accuracy down the barrel. To a lesser degree it is. But the real harmonic hero/culprit is the vibration caused by the powder charge. Say you worked up a load of 54.5 gr. of H4831sc, which just happened to be in a node that ran from 54-55.5 (gr. of powder) in your rifle. There wouldn't be anything throwing that bullet off at all. The drop of 50-70 fps isn't hardly noticeable @ 100 and won't make but 2" difference @ 300. Say for instance that the accuracy node you hit happened to "spring" the bullet out of the end of the barrel (as opposed to throwing it left or right). At that point velocity won't make a difference until even further out. -Hope that helps [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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270 WIN Erratic ES, Great Accuracy???
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