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The Basics, Starting Out
Bullet construction
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<blockquote data-quote="Petey308" data-source="post: 3025712" data-attributes="member: 106845"><p>Yes, they had to thicken the jackets due to issues with the increased friction from the faster twist barrels and that heat produced transferring through the jacket and into the lead core, melting it. They'd randomly blow up in flight. </p><p></p><p>Thickening the jackets allowed less heat getting to the core. The issue though that was produced by that was the ogive portion of the jacket ended up being thicker and would create issues with reliable expansion on game. The more resistance the bullet encountered, the less of an issue, so that why you see/saw those results you spoke off. </p><p></p><p>All that said, I have seen the new lots of VLDs have internal ribbing applied to the ogive area of the jackets, just as all the hybrid ogive versions do. That ribbing weakens the ogive and allows for reliable expansion with both higher and lower amounts of resistance encountered by the bullet, as well as both higher and lower impact velocities. </p><p></p><p>Another thing to note though is a VLD ogive, or more specifically any real secant ogive, will be overall more narrow in profile and that in turn adds a degree of strength and rigidity and that will create some resisting to expansion by itself. A more rounded and tangent profile ogive is more ideal regarding terminal ballistics and also internal ballistics, but a secant is more ideal regarding external ballistics. The hybrid ogives have done a decent job at balancing that all. Tipped bullets, as well as monos with features added to help weaken the ogive and promote reliable expansion have helped a lot too. </p><p></p><p>Hopefully that helps.</p></blockquote><p></p>
[QUOTE="Petey308, post: 3025712, member: 106845"] Yes, they had to thicken the jackets due to issues with the increased friction from the faster twist barrels and that heat produced transferring through the jacket and into the lead core, melting it. They’d randomly blow up in flight. Thickening the jackets allowed less heat getting to the core. The issue though that was produced by that was the ogive portion of the jacket ended up being thicker and would create issues with reliable expansion on game. The more resistance the bullet encountered, the less of an issue, so that why you see/saw those results you spoke off. All that said, I have seen the new lots of VLDs have internal ribbing applied to the ogive area of the jackets, just as all the hybrid ogive versions do. That ribbing weakens the ogive and allows for reliable expansion with both higher and lower amounts of resistance encountered by the bullet, as well as both higher and lower impact velocities. Another thing to note though is a VLD ogive, or more specifically any real secant ogive, will be overall more narrow in profile and that in turn adds a degree of strength and rigidity and that will create some resisting to expansion by itself. A more rounded and tangent profile ogive is more ideal regarding terminal ballistics and also internal ballistics, but a secant is more ideal regarding external ballistics. The hybrid ogives have done a decent job at balancing that all. Tipped bullets, as well as monos with features added to help weaken the ogive and promote reliable expansion have helped a lot too. Hopefully that helps. [/QUOTE]
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