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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Slo-mo barrel harmonics video
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<blockquote data-quote="Mikecr" data-source="post: 1228400" data-attributes="member: 1521"><p>There is another vibration, which is the basis of OBT. That is a pressure induced wave traveling back & forth, source to muzzle & back. A wave of bore dimension change.</p><p>And then there are vibrational waves from pretty much any rigid to the barrel interface/pressure point. This, including chambered tensions setup by crooked ammo, or your thumb resting on the action tang. You can read about these in 'Rifle Accuracy Facts'.</p><p>These could not be seen with video directly as they are dimensionally tiny. But they can be measured with strain gages or laser mic and a DAS. That is, if you could stop pretty much all other movements, and employed a very high sample rate (the waves travel at the speed of sound in steel). Either that or measure all movements at once..</p><p></p><p>Truly seeing what's happening how much & when is not an easy endeavor.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1228400, member: 1521"] There is another vibration, which is the basis of OBT. That is a pressure induced wave traveling back & forth, source to muzzle & back. A wave of bore dimension change. And then there are vibrational waves from pretty much any rigid to the barrel interface/pressure point. This, including chambered tensions setup by crooked ammo, or your thumb resting on the action tang. You can read about these in 'Rifle Accuracy Facts'. These could not be seen with video directly as they are dimensionally tiny. But they can be measured with strain gages or laser mic and a DAS. That is, if you could stop pretty much all other movements, and employed a very high sample rate (the waves travel at the speed of sound in steel). Either that or measure all movements at once.. Truly seeing what's happening how much & when is not an easy endeavor. [/QUOTE]
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Slo-mo barrel harmonics video
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