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Rifles, Reloading, Optics, Equipment
Reloading
Pulling bullets / Reseating / Neck Tension
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<blockquote data-quote="woods" data-source="post: 811652" data-attributes="member: 6042"><p>I guess it does surprise me if the percentage is correct at 90%. Just pulled that percentage out of the air so it might be less. Wouldn't surprise me if it was 60% that were wrong. Seems like there are a lot of rote reloaders who hear several say something and bingo, must be true. Sometimes it might be easier if I didn't have to prove everything to myself.</p><p></p><p>You mentioned springback and that is a seemingly simple concept that is just mentioned in passing and never fully explained. Went looking for proof or facts several years ago about the simple question of whether soft brass or work hardened brass had more springback. Never found any, just one article in a gun rag that SAID that work hardened brass had more springback.</p><p></p><p>It seems intuitive to me that soft brass would have more springback since brass expansion in a chamber as regards shoulder movement gets progressively less as the brass is work hardened. i.e. the shoulder moves forward approx. 85% of the total distance it will expand on the first firing, approx. 10% on the second firing and doesn't springback at all on the 3rd or 4th firing when it develops a crush fit.</p><p></p><p>IOW very little is known (at least by me) about the variables that influence the amount of springback. i.e. when, where & why</p><p></p><p>So do you have any explanation why the cases of mine that had been fired more often did not return to a different dimension? Or is the variation in springback in work hardened brass as opposed to new soft brass negligible or so small that it doesn't exhibit itself in thousandths?</p></blockquote><p></p>
[QUOTE="woods, post: 811652, member: 6042"] I guess it does surprise me if the percentage is correct at 90%. Just pulled that percentage out of the air so it might be less. Wouldn't surprise me if it was 60% that were wrong. Seems like there are a lot of rote reloaders who hear several say something and bingo, must be true. Sometimes it might be easier if I didn't have to prove everything to myself. You mentioned springback and that is a seemingly simple concept that is just mentioned in passing and never fully explained. Went looking for proof or facts several years ago about the simple question of whether soft brass or work hardened brass had more springback. Never found any, just one article in a gun rag that SAID that work hardened brass had more springback. It seems intuitive to me that soft brass would have more springback since brass expansion in a chamber as regards shoulder movement gets progressively less as the brass is work hardened. i.e. the shoulder moves forward approx. 85% of the total distance it will expand on the first firing, approx. 10% on the second firing and doesn't springback at all on the 3rd or 4th firing when it develops a crush fit. IOW very little is known (at least by me) about the variables that influence the amount of springback. i.e. when, where & why So do you have any explanation why the cases of mine that had been fired more often did not return to a different dimension? Or is the variation in springback in work hardened brass as opposed to new soft brass negligible or so small that it doesn't exhibit itself in thousandths? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Pulling bullets / Reseating / Neck Tension
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