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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A small contribution to the shooting community
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<blockquote data-quote="BryanLitz" data-source="post: 382057" data-attributes="member: 7848"><p>I wouldn't wish my tedious method on anyone.</p><p></p><p>First step is to mount the bullet in a lathe and indicate the bullet ogive with a dial indicator every 0.025" along it's surface. Then input those coordinates into a computer program that calculates ogive radius and length. Then calculate the radius of a perfectly tangent ogive of that length. Finally, divide the 'perfectly tangent' ogive radius by the measured ogive radius. The result is Rt/R.</p><p></p><p>I'm sure there are other ways to skin this cat, but I've found this method to be (more or less) reliable and repeatable even if it is a little maddening.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 382057, member: 7848"] I wouldn't wish my tedious method on anyone. First step is to mount the bullet in a lathe and indicate the bullet ogive with a dial indicator every 0.025" along it's surface. Then input those coordinates into a computer program that calculates ogive radius and length. Then calculate the radius of a perfectly tangent ogive of that length. Finally, divide the 'perfectly tangent' ogive radius by the measured ogive radius. The result is Rt/R. I'm sure there are other ways to skin this cat, but I've found this method to be (more or less) reliable and repeatable even if it is a little maddening. -Bryan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A small contribution to the shooting community
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