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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity E.S. vs Vertical Dispersion at 1,000 yards
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<blockquote data-quote="a.JR" data-source="post: 30101" data-attributes="member: 1391"><p>Any ideas how that works?!?....Monte,The reason for the differences you see "at the Target" is mainly from the discrepency in the B.C. from bullet to bullet...If you are not carefully qualifying all of the bullets used in competition you will never reduce the vertical dispersion...If you were to shoot a set of cartridges(10 say) with a magical spread of 20 fps at the muzzle and you also had 10 bullets with a B.C. spread of .510 to .530 ,then the speed difference at 1K could be as high as 50 fps or.... To make all 10 shots on the "paper" as close to the same as possible is my quest,the use of chrono's and ballistic programs only serve to confuse the issue during my research and testing ...JR..Jeff Rogers</p></blockquote><p></p>
[QUOTE="a.JR, post: 30101, member: 1391"] Any ideas how that works?!?....Monte,The reason for the differences you see "at the Target" is mainly from the discrepency in the B.C. from bullet to bullet...If you are not carefully qualifying all of the bullets used in competition you will never reduce the vertical dispersion...If you were to shoot a set of cartridges(10 say) with a magical spread of 20 fps at the muzzle and you also had 10 bullets with a B.C. spread of .510 to .530 ,then the speed difference at 1K could be as high as 50 fps or.... To make all 10 shots on the "paper" as close to the same as possible is my quest,the use of chrono's and ballistic programs only serve to confuse the issue during my research and testing ...JR..Jeff Rogers [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity E.S. vs Vertical Dispersion at 1,000 yards
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