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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BC and engraving on the bullet - More lands and grooves or less?
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<blockquote data-quote="Gerard Schultz" data-source="post: 1078499" data-attributes="member: 51"><p>All barrels have bore and groove dimensions that are followed by barrelmakers, whether they are polygonal rifling, conventional cut, hammer forged or any type of configuration from two lands to as many as one wants and shaped in any manner.</p><p></p><p>Typically the land height of a .224" bore is 0.065 mm or 0.0026" and the land height of a .50" bore is 0.115 mm or 0.0045".</p><p></p><p>Ignoring all the advantages of more/less lands, the shape of these lands and considering only how the number and shape affects BC and airflow over the surface of the bullet, do more or less lands positively or negatively influence BC or airflow?</p><p></p><p>Are there credible studies that have looked at this?</p></blockquote><p></p>
[QUOTE="Gerard Schultz, post: 1078499, member: 51"] All barrels have bore and groove dimensions that are followed by barrelmakers, whether they are polygonal rifling, conventional cut, hammer forged or any type of configuration from two lands to as many as one wants and shaped in any manner. Typically the land height of a .224" bore is 0.065 mm or 0.0026" and the land height of a .50" bore is 0.115 mm or 0.0045". Ignoring all the advantages of more/less lands, the shape of these lands and considering only how the number and shape affects BC and airflow over the surface of the bullet, do more or less lands positively or negatively influence BC or airflow? Are there credible studies that have looked at this? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BC and engraving on the bullet - More lands and grooves or less?
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