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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A quick word on BC
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<blockquote data-quote="MontanaRifleman" data-source="post: 357771" data-attributes="member: 11717"><p>Michael, I agree overall and I'm not sure how much lengthing a bullet affects it's BC. As to the differences between the shapes of the E-Tips and The ABs, when I seat to the Lands with my 200 AB's and 180 E-Tips, I get different COALs which suggests different nose shapes. I'm not sure if that would hold up with the 189 E-Tips?</p><p> </p><p>Another interesting observation is what you found in your testing to be the BC of the 180 AB's vs Bryan's. When I run the Litz 180 AB in JBM and take the MV and 1000 yd velocity and plug them into the balastic calc, I get .486 for the AB. Now 1000 yds might be farther than you set your chrony's, but I think it just goes to show that all of us amatures can come with fairly significant differences when we're using our lower grade equipment and methods.</p><p> </p><p>Just something to think about.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 357771, member: 11717"] Michael, I agree overall and I'm not sure how much lengthing a bullet affects it's BC. As to the differences between the shapes of the E-Tips and The ABs, when I seat to the Lands with my 200 AB's and 180 E-Tips, I get different COALs which suggests different nose shapes. I'm not sure if that would hold up with the 189 E-Tips? Another interesting observation is what you found in your testing to be the BC of the 180 AB's vs Bryan's. When I run the Litz 180 AB in JBM and take the MV and 1000 yd velocity and plug them into the balastic calc, I get .486 for the AB. Now 1000 yds might be farther than you set your chrony's, but I think it just goes to show that all of us amatures can come with fairly significant differences when we're using our lower grade equipment and methods. Just something to think about. [/QUOTE]
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A quick word on BC
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