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Rifles, Reloading, Optics, Equipment
Reloading
Lee Collet Neck Tension Question
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<blockquote data-quote="boomtube" data-source="post: 473434" data-attributes="member: 9215"><p>".....NO you do not heat the necks until they are dull red, you have gone way too far!"</p><p> </p><p>BIG ditto. </p><p> </p><p>You may try heating necks in a darkened room until you barely detect a glow starting but you have to drop the case into a water bucket immediatly or you will have gone too far. Over annealing isn't "dangerous" but it will destroy any effective bullet grip because the metal becomes too soft and loses it's "springback" qualities. </p><p> </p><p>Lee is correct that any neck smaller than about 1 - 1.5 thou under bullet diameter simply increases the lever pressure needed to expand the neck during seating. That extra resistance WILL increase runout. But smaller necks won't do a thing to increase "bullet tension" - the brass will simply exceed it's elastic limits as it's stretched larger so the actual bullet grip will remain quite steady after about 1 thou or so of stretching. </p><p> </p><p>Check me on that if you disagree, mike a loaded neck, pull the bullet and mike it again at the same place. What you will see is the amount of neck "springback" and that's all the 'bullet tension' you gonna get, no matter how much smaller the neck was before seating.</p></blockquote><p></p>
[QUOTE="boomtube, post: 473434, member: 9215"] ".....NO you do not heat the necks until they are dull red, you have gone way too far!" BIG ditto. You may try heating necks in a darkened room until you barely detect a glow starting but you have to drop the case into a water bucket immediatly or you will have gone too far. Over annealing isn't "dangerous" but it will destroy any effective bullet grip because the metal becomes too soft and loses it's "springback" qualities. Lee is correct that any neck smaller than about 1 - 1.5 thou under bullet diameter simply increases the lever pressure needed to expand the neck during seating. That extra resistance WILL increase runout. But smaller necks won't do a thing to increase "bullet tension" - the brass will simply exceed it's elastic limits as it's stretched larger so the actual bullet grip will remain quite steady after about 1 thou or so of stretching. Check me on that if you disagree, mike a loaded neck, pull the bullet and mike it again at the same place. What you will see is the amount of neck "springback" and that's all the 'bullet tension' you gonna get, no matter how much smaller the neck was before seating. [/QUOTE]
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Lee Collet Neck Tension Question
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