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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Terminal velocity
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<blockquote data-quote="Warren Jensen" data-source="post: 21200" data-attributes="member: 21"><p>Brent and Ian,</p><p></p><p>What you say is true, concerning mushrooms and impact speed. What kills is the wound channel, both the width and depth. Penetration velocity (not impact velocity) is very important to the width of the wound channel. A large diameter projectile or mushroomed bullet may not cause as wide a wound channel as a projectile with a lesser cross section but penetrating much faster. This is the wave effect and is especially noticeable in projectiles that impact above 3300 fps, present moderate cross sections, and maintain their mass and velocity at a much higher level. </p><p></p><p>Most conventional mushrooms take from 17-23% of the total available energy upon impact just to form the expanded shape (mushroom). This is energy that is not available to perform the work of penetration. There are other ways to present an enlarged cross section and do it using only 3-5% of the total energy at impact.</p></blockquote><p></p>
[QUOTE="Warren Jensen, post: 21200, member: 21"] Brent and Ian, What you say is true, concerning mushrooms and impact speed. What kills is the wound channel, both the width and depth. Penetration velocity (not impact velocity) is very important to the width of the wound channel. A large diameter projectile or mushroomed bullet may not cause as wide a wound channel as a projectile with a lesser cross section but penetrating much faster. This is the wave effect and is especially noticeable in projectiles that impact above 3300 fps, present moderate cross sections, and maintain their mass and velocity at a much higher level. Most conventional mushrooms take from 17-23% of the total available energy upon impact just to form the expanded shape (mushroom). This is energy that is not available to perform the work of penetration. There are other ways to present an enlarged cross section and do it using only 3-5% of the total energy at impact. [/QUOTE]
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Terminal velocity
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