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<blockquote data-quote="Jon A" data-source="post: 111407" data-attributes="member: 319"><p>[ QUOTE ]</p><p>If weight is added to a bullet and the shape remains the same, then the bc will go up because the bullet is getting longer while the shape is staying the same.</p><p></p><p>[/ QUOTE ]</p><p>It doesn't have to get longer. Fill the same jacket full of tungsten instead of lead and the BC will go up with no change in shape or length. The weight by itself will increase the BC since BC is a function of weight (and diameter and form factor). That's what he was saying.</p><p></p><p>With the same meplat, ogive and boattail, adding length in the shank changes the form factor very little and BC will go up pretty much in proportion to the weight. Of course the length allows you to use a longer ogive and boattail, etc, so you can improve the form factor while you're at it. But you don't have to in order to increase the BC.</p></blockquote><p></p>
[QUOTE="Jon A, post: 111407, member: 319"] [ QUOTE ] If weight is added to a bullet and the shape remains the same, then the bc will go up because the bullet is getting longer while the shape is staying the same. [/ QUOTE ] It doesn't have to get longer. Fill the same jacket full of tungsten instead of lead and the BC will go up with no change in shape or length. The weight by itself will increase the BC since BC is a function of weight (and diameter and form factor). That's what he was saying. With the same meplat, ogive and boattail, adding length in the shank changes the form factor very little and BC will go up pretty much in proportion to the weight. Of course the length allows you to use a longer ogive and boattail, etc, so you can improve the form factor while you're at it. But you don't have to in order to increase the BC. [/QUOTE]
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