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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Let's argue about BC's
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<blockquote data-quote="groper" data-source="post: 474464" data-attributes="member: 12550"><p>Ive never tried it, but im not surprised by your findings...</p><p></p><p>See the BC is made up of 2 Main components, one is its energy and is therefore governed by its mass.</p><p></p><p>The other is its aerodynamic drag, which is totally unrelated to its mass obviously.</p><p></p><p>So for a light bullet, vs a heavy bullet, both with the same BC, one bullet has less aerodynamic drag component, the other has more drag but makes up for this with more mass to arrive at the same BC.</p><p></p><p>So when we are considering wind drift, the inertia of the bullet, is what the wind is fighting in order to accelerate the bullet sideways, so i would say the aerodynamic drag properties are not as important as its mass properties. ... therefore i would expect its main governing factor to be the bullet mass and.... side profile area- which would govern the magnitude of the wind force for a given wind velocity... The frontal aerodynamic drag i would expect to have little/no effect in this regard, and i would expect it to explain the difference in wind drift from heavy/light bullets with same BC - although i could just be talking out my *** <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="groper, post: 474464, member: 12550"] Ive never tried it, but im not surprised by your findings... See the BC is made up of 2 Main components, one is its energy and is therefore governed by its mass. The other is its aerodynamic drag, which is totally unrelated to its mass obviously. So for a light bullet, vs a heavy bullet, both with the same BC, one bullet has less aerodynamic drag component, the other has more drag but makes up for this with more mass to arrive at the same BC. So when we are considering wind drift, the inertia of the bullet, is what the wind is fighting in order to accelerate the bullet sideways, so i would say the aerodynamic drag properties are not as important as its mass properties. ... therefore i would expect its main governing factor to be the bullet mass and.... side profile area- which would govern the magnitude of the wind force for a given wind velocity... The frontal aerodynamic drag i would expect to have little/no effect in this regard, and i would expect it to explain the difference in wind drift from heavy/light bullets with same BC - although i could just be talking out my *** :D [/QUOTE]
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Let's argue about BC's
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