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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to adjust b.c. to get ballistic chart to match drops
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<blockquote data-quote="BrentM" data-source="post: 2315889" data-attributes="member: 61747"><p>Many of us use shooter due to the simplicity and accuracy of the program. I've used a pile and its one of the easiest to plug and play and lines up with AB quite well. AB is the best engine there is so.....</p><p></p><p>Now, when looking at a program to calibrate data you have to think this through...... that data has to be spot on to be accurate. There is no forgetting or discounting anything for any reason. So yes, using actual drop data to input for the distance and drop is how you do it. The issue is is that your data for the 1000 is way off. Trying to calibrate and do a semi custom curve is not lining up with that data. Using the 3 inputs the 1000 does not want to correct well. To get to 30 moa it drops mv to 2626 vs 2780. That calibration messes with the 300/600 results big time.</p><p></p><p>So something is significantly off or missing from the data. My guess is either scope tracking is off, you had a down draft or mirage at 1000, or shooter error. Could be something as simple your zero not being zero'd. You didn't mention zero range so I used 100 for a default.</p></blockquote><p></p>
[QUOTE="BrentM, post: 2315889, member: 61747"] Many of us use shooter due to the simplicity and accuracy of the program. I've used a pile and its one of the easiest to plug and play and lines up with AB quite well. AB is the best engine there is so..... Now, when looking at a program to calibrate data you have to think this through...... that data has to be spot on to be accurate. There is no forgetting or discounting anything for any reason. So yes, using actual drop data to input for the distance and drop is how you do it. The issue is is that your data for the 1000 is way off. Trying to calibrate and do a semi custom curve is not lining up with that data. Using the 3 inputs the 1000 does not want to correct well. To get to 30 moa it drops mv to 2626 vs 2780. That calibration messes with the 300/600 results big time. So something is significantly off or missing from the data. My guess is either scope tracking is off, you had a down draft or mirage at 1000, or shooter error. Could be something as simple your zero not being zero'd. You didn't mention zero range so I used 100 for a default. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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How to adjust b.c. to get ballistic chart to match drops
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