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Long Range Hunting & Shooting
"Truing" Ballistics Programs, Methods and Suggestions
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<blockquote data-quote="Topshot" data-source="post: 603665" data-attributes="member: 13285"><p>Sounds OK but there could be a few variables that you need to consider that may make a difference. Below is a list that I have put together to remind myself that it is not always easy.</p><p>Best to repeat your testing a few times under ideal conditions if possible.</p><p>At the end of the day if you are hitting steel out to 1400 yards you are doing real well. Sounds like you are on the right path.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">1. The Shooter.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">2. Scope calibration error</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">3. Chronographed velocity wrong.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">4. Parallax.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">5. wind.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">6. Mirage.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">7. Atmospheric readings wrong.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">8. Cant.</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">9. Distance measurement error</span></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 12px"><span style="color: #000000">10. Variations in rifle hold, rear bag placement, recoil control, cheek weld etc between different field shooting positions.</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">11. Change in velocity due to powder temp.</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">12. Failure to obtain precise zero.</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">13. Using G1 B.C.'s at extreme velocity and distance. (with boat tail pills.)</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">14. Errors in ballistic software.</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">15. Scope height error.</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">16. Click value of scope different to what manufacturer states. </span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px">Last but not least the B.C. value of the bullet!</span></span></span></p><p><span style="color: #000000"><span style="font-family: 'Arial'"><span style="font-size: 12px"></span></span></span></p></blockquote><p></p>
[QUOTE="Topshot, post: 603665, member: 13285"] Sounds OK but there could be a few variables that you need to consider that may make a difference. Below is a list that I have put together to remind myself that it is not always easy. Best to repeat your testing a few times under ideal conditions if possible. At the end of the day if you are hitting steel out to 1400 yards you are doing real well. Sounds like you are on the right path.:) [FONT=Arial][SIZE=3][COLOR=#000000]1. The Shooter. 2. Scope calibration error 3. Chronographed velocity wrong. 4. Parallax. 5. wind. 6. Mirage. 7. Atmospheric readings wrong. 8. Cant. 9. Distance measurement error 10. Variations in rifle hold, rear bag placement, recoil control, cheek weld etc between different field shooting positions.[/COLOR][/SIZE][/FONT] [COLOR=#000000][FONT=Arial][SIZE=3]11. Change in velocity due to powder temp. 12. Failure to obtain precise zero. 13. Using G1 B.C.'s at extreme velocity and distance. (with boat tail pills.) 14. Errors in ballistic software. 15. Scope height error. 16. Click value of scope different to what manufacturer states. [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial][SIZE=3]Last but not least the B.C. value of the bullet! [/SIZE][/FONT][/COLOR] [/QUOTE]
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