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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
need help with bullet drop calculation
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<blockquote data-quote="LouBoyd" data-source="post: 443400" data-attributes="member: 9253"><p>If you're really splitting hairs the measurements used in most computer programs are referenced to the rifles bore at the muzzle. The distance you want in the calculations is the distance between a line from center of the objective lens to the center of the zero target, then perpendicular from that line to the center of the barrel's crown. That is the distance below the line of sight where the bullet is free to begin it's trajectory. </p><p></p><p>There is no situation where the bore and zero line of sight are parallel. The error in measuring from the scope to the chamber increases as the angle increases.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 443400, member: 9253"] If you're really splitting hairs the measurements used in most computer programs are referenced to the rifles bore at the muzzle. The distance you want in the calculations is the distance between a line from center of the objective lens to the center of the zero target, then perpendicular from that line to the center of the barrel's crown. That is the distance below the line of sight where the bullet is free to begin it's trajectory. There is no situation where the bore and zero line of sight are parallel. The error in measuring from the scope to the chamber increases as the angle increases. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
need help with bullet drop calculation
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