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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension
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<blockquote data-quote="ntsqd" data-source="post: 3059455" data-attributes="member: 93138"><p>Reading thru this thread I'm struck by an observation that where the case neck is in it's own stress/strain curve matters. Say it is well within the elastic zone, then making the neck another .002" smaller will result in a linear increase in how tight the neck is on the bullet.</p><p></p><p>BUT if making the neck .002" smaller pushes it into the plastic zone of the stress/strain curve when the bullet is inserted then the results aren't easily predicted. It may not change anything, or it may be a nearly linear increase in neck tension.</p><p></p><p>The degree of work hardening in the case neck will be a big factor in all of this. I knew why case annealing was done, but I hadn't connected these dots quite this way.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 3059455, member: 93138"] Reading thru this thread I'm struck by an observation that where the case neck is in it's own stress/strain curve matters. Say it is well within the elastic zone, then making the neck another .002" smaller will result in a linear increase in how tight the neck is on the bullet. BUT if making the neck .002" smaller pushes it into the plastic zone of the stress/strain curve when the bullet is inserted then the results aren't easily predicted. It may not change anything, or it may be a nearly linear increase in neck tension. The degree of work hardening in the case neck will be a big factor in all of this. I knew why case annealing was done, but I hadn't connected these dots quite this way. [/QUOTE]
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