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The Basics, Starting Out
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<blockquote data-quote="BallisticsGuy" data-source="post: 1480638" data-attributes="member: 96226"><p>I've been working with OP via PM's to solve his issue. The issue IS NOT BC related. If it were then the error he was seeing from 300-400 would not have appeared in a really visible way unless the BC was MASSIVELY misstated. I also tried BC's all the way down to .385 which produced results that lined up exactly nowhere. That said, G1 BC's are only valid within particular velocity windows and bullet companies like to state their BC's based on the intended use of the particular projectile which is usually a lot closer than many of us would tend to focus on. G1 like G7 is only a mathematical model. There are limits.</p><p></p><p>We've already identified a 100fps error in the initial MV due to chronograph setup and his zero range was definitely not 200yrds. When all the inputs were put in correctly the calculated drops and actual drops line up within the cone of error that comes from his group size, minor environmental changes and likely shooter error (+/- .7MOA).</p></blockquote><p></p>
[QUOTE="BallisticsGuy, post: 1480638, member: 96226"] I've been working with OP via PM's to solve his issue. The issue IS NOT BC related. If it were then the error he was seeing from 300-400 would not have appeared in a really visible way unless the BC was MASSIVELY misstated. I also tried BC's all the way down to .385 which produced results that lined up exactly nowhere. That said, G1 BC's are only valid within particular velocity windows and bullet companies like to state their BC's based on the intended use of the particular projectile which is usually a lot closer than many of us would tend to focus on. G1 like G7 is only a mathematical model. There are limits. We've already identified a 100fps error in the initial MV due to chronograph setup and his zero range was definitely not 200yrds. When all the inputs were put in correctly the calculated drops and actual drops line up within the cone of error that comes from his group size, minor environmental changes and likely shooter error (+/- .7MOA). [/QUOTE]
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