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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Let's argue about BC's
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<blockquote data-quote="groper" data-source="post: 476139" data-attributes="member: 12550"><p>Michael, </p><p></p><p>Measure you scope bore ht, verify your zero, verify all environmental conditions, adjust for the scope error your scope has per click value, use the litz G7 BC and lastly, adjust your trajectory fit by adjusting the velocity in the calculator to get onto center mass at AT 1000yds - dont listen to your chrony. I say 1000yds, because this is the distance Bryan Litz averages his derived BC`s across and is a large enough distance to achieve a decent resolution. I say dont listen to your chrony, as its apparent to me after reading your previous posts, this is definately a source of a good portion of the error. My chrony also gave me headaches...</p><p></p><p>So lets say after youve checked everything, you needed say exactly 70 clicks to get your groups center of the x at a target verified exactly 1000yds away in a no wind situation - wind throws your impacts vertical due to the magnus effect. Very light wind ok, wait for another day if the wind is strong. Keep adjusting the velocity in the calculator until it tells you 70clicks using Litz`s BC and the environmentals of the day. Your trajectory should now fit all the time, anywhere you shoot.</p></blockquote><p></p>
[QUOTE="groper, post: 476139, member: 12550"] Michael, Measure you scope bore ht, verify your zero, verify all environmental conditions, adjust for the scope error your scope has per click value, use the litz G7 BC and lastly, adjust your trajectory fit by adjusting the velocity in the calculator to get onto center mass at AT 1000yds - dont listen to your chrony. I say 1000yds, because this is the distance Bryan Litz averages his derived BC`s across and is a large enough distance to achieve a decent resolution. I say dont listen to your chrony, as its apparent to me after reading your previous posts, this is definately a source of a good portion of the error. My chrony also gave me headaches... So lets say after youve checked everything, you needed say exactly 70 clicks to get your groups center of the x at a target verified exactly 1000yds away in a no wind situation - wind throws your impacts vertical due to the magnus effect. Very light wind ok, wait for another day if the wind is strong. Keep adjusting the velocity in the calculator until it tells you 70clicks using Litz`s BC and the environmentals of the day. Your trajectory should now fit all the time, anywhere you shoot. [/QUOTE]
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Let's argue about BC's
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