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Rifles, Reloading, Optics, Equipment
7mm STW
What am I missing??
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<blockquote data-quote="Lefty7mmstw" data-source="post: 1008404" data-attributes="member: 48043"><p>effectively, your bc goes up as the air thins with altitude, your barrel may distort the bullet more or less then the barrel used for the bc measurements, bc changes a bit with velocity (it won't even be the same all the way out in your rifle), and twist rate will change your bc a bit (especially slower than recommended twist) as the bullet can have a bit of yaw to it and hence a bit more frontal surface area.</p><p> </p><p> bc really is relative...</p><p>At the ranges I usually shoot I make sure I have a pointy bullet with enough weight to carry well (produce decent bc) and leave the bc wrangling to those who consistently go really long. I'm more concerned with accuracy but don't want a blunt/stubby bullet screwing things up for me if I need to stretch a bit.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 1008404, member: 48043"] effectively, your bc goes up as the air thins with altitude, your barrel may distort the bullet more or less then the barrel used for the bc measurements, bc changes a bit with velocity (it won't even be the same all the way out in your rifle), and twist rate will change your bc a bit (especially slower than recommended twist) as the bullet can have a bit of yaw to it and hence a bit more frontal surface area. bc really is relative... At the ranges I usually shoot I make sure I have a pointy bullet with enough weight to carry well (produce decent bc) and leave the bc wrangling to those who consistently go really long. I'm more concerned with accuracy but don't want a blunt/stubby bullet screwing things up for me if I need to stretch a bit. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
What am I missing??
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