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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question for 50 Cal shooters
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<blockquote data-quote="LouBoyd" data-source="post: 399023" data-attributes="member: 9253"><p>SD does go up with bullet weight for a given shape and material. For two objects of the same shape mass increases with the cube of the linear dimensions while frontal area increases with the square of the linear dimensions. But SD does not by itself tell anything about bullet stability. Even knowing the exact mass, velocity, bullet shape, spin rate, and atmosphere doesn't determine it's stability. How the mass is distrbuted internal to the bullet affects it's rotational inertia and center of gravity all of which affects stability. </p><p></p><p>The above information may come from a great shooter and great barrel maker but what was in your post simply does not describe what makes a bullet stable or not.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 399023, member: 9253"] SD does go up with bullet weight for a given shape and material. For two objects of the same shape mass increases with the cube of the linear dimensions while frontal area increases with the square of the linear dimensions. But SD does not by itself tell anything about bullet stability. Even knowing the exact mass, velocity, bullet shape, spin rate, and atmosphere doesn't determine it's stability. How the mass is distrbuted internal to the bullet affects it's rotational inertia and center of gravity all of which affects stability. The above information may come from a great shooter and great barrel maker but what was in your post simply does not describe what makes a bullet stable or not. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question for 50 Cal shooters
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