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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="MontanaRifleman" data-source="post: 475806" data-attributes="member: 11717"><p>That change in shape is very insignificant in the vast majority of cases. Bullets are manufactured so identical that any possible difference in BC would be un-noticable. BC testing is done by firing and the results are from bullets that have been through the bore and any difference from one bore to the other is insignificant.</p><p> </p><p>Bryan Litz is a professional in this field and probably one of top professionals in this field. He has education, training and experience in this field far beyond any of us. He has done more bullet testing than any ten (or 20... or 30... or...) of us put together. Why some folks get different BC's, I can't say for sure, but as has already been mentioned it's likely because of deviations with their equipement.... scope, chrony, etc.</p><p> </p><p>Bottom line... accurately tested BC's are a very useful tool for the LR shooter. If in your testing, another number works for you then use it. Personally, I would go to great lengths to measure the accuracy of my equipement. I have two chrony's that differ by 5-60 fps (on the same string of shots) with no consistancy in difference. And when light conditons change, their readings change. </p><p> </p><p>Bullet BC's do not change from bullet to bullet, lot to lot, or bore to bore.</p><p> </p><p>-Mark</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 475806, member: 11717"] That change in shape is very insignificant in the vast majority of cases. Bullets are manufactured so identical that any possible difference in BC would be un-noticable. BC testing is done by firing and the results are from bullets that have been through the bore and any difference from one bore to the other is insignificant. Bryan Litz is a professional in this field and probably one of top professionals in this field. He has education, training and experience in this field far beyond any of us. He has done more bullet testing than any ten (or 20... or 30... or...) of us put together. Why some folks get different BC's, I can't say for sure, but as has already been mentioned it's likely because of deviations with their equipement.... scope, chrony, etc. Bottom line... accurately tested BC's are a very useful tool for the LR shooter. If in your testing, another number works for you then use it. Personally, I would go to great lengths to measure the accuracy of my equipement. I have two chrony's that differ by 5-60 fps (on the same string of shots) with no consistancy in difference. And when light conditons change, their readings change. Bullet BC's do not change from bullet to bullet, lot to lot, or bore to bore. -Mark [/QUOTE]
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Let's argue about BC's
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