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Rifles, Reloading, Optics, Equipment
Reloading
Case neck condition testing
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<blockquote data-quote="MagnumManiac" data-source="post: 2590400" data-attributes="member: 10755"><p>My take on this, and I have tested extensively, is that a dry lube is best.</p><p>Have tested finely powdered graphite, mica and HBN.</p><p>Regardless that I use HBN coated bullets, I always found tighter groups, with set sizes of 10 shots minimum over several days in differing weather for a 50-100 round total count, that powdered graphite applied to the inside of the necks after/during sizing produced the best results.</p><p>In a given sample, the amount of graphite applied is very, very small. Hardly visible to the naked eye…removing it opened groups substantially and I rarely use neck tension/interference greater than .0015" as measured AFTER spring back.</p><p>HBN alone did not tighten groups, but made tuning easier and with the addition of graphite in my process, the tuning was such that I could open and tighten groups as I changed the HBN tumbling/coating time.</p><p>As Mikecr said, bullets are not released by friction, but they are held by friction for a very short time and this influences peak barrel time, as does seating depth.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2590400, member: 10755"] My take on this, and I have tested extensively, is that a dry lube is best. Have tested finely powdered graphite, mica and HBN. Regardless that I use HBN coated bullets, I always found tighter groups, with set sizes of 10 shots minimum over several days in differing weather for a 50-100 round total count, that powdered graphite applied to the inside of the necks after/during sizing produced the best results. In a given sample, the amount of graphite applied is very, very small. Hardly visible to the naked eye…removing it opened groups substantially and I rarely use neck tension/interference greater than .0015” as measured AFTER spring back. HBN alone did not tighten groups, but made tuning easier and with the addition of graphite in my process, the tuning was such that I could open and tighten groups as I changed the HBN tumbling/coating time. As Mikecr said, bullets are not released by friction, but they are held by friction for a very short time and this influences peak barrel time, as does seating depth. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case neck condition testing
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