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Rifles, Reloading, Optics, Equipment
Reloading
Quick question on pulling bullets
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<blockquote data-quote="Pdvdh" data-source="post: 401876" data-attributes="member: 4191"><p>Whether or not one exceeds the yield strength of the brass in the case neck is dependent on the yield (in tension) strength (units of lbs) of the brass, and the cross-sectional area of the brass case neck (units of square inches) exposed to that tensile force. This cross-sectional area will clearly vary dependent on the <u>length</u> of the case neck, the <u>depth the bullet is seated into the case neck</u> (partially or through the entire length of case neck), and lastly, the <u>thickness of the brass</u> case neck wall in the contact area with the seated bullet. </p><p></p><p>These <u>three</u> pertinent cartridge case neck criteria affect the case neck tensile force required to exceed the tensile yield strength of the brass case neck. These just serve as examples of why I stated, I think it's more complicated than that.</p><p></p><p>I'll try to experiment with one of my ultrasonically cleaned cartridge cases tonight, because the higher coefficient of friction with one of these cases should exhibit additional bullet pulling force, compared to a lubricated case neck, under added neck tension. Although I have to add, my opinion is a by-product of my prior experiences prepping cases, seating bullets, and pulling bullets. And then trying to gauge the necessity of resizing the necks again prior to seating a bullet in the cartridge case the second time, based exclusively on the press handle resistance to seating/pulling the bullet the second time around.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 401876, member: 4191"] Whether or not one exceeds the yield strength of the brass in the case neck is dependent on the yield (in tension) strength (units of lbs) of the brass, and the cross-sectional area of the brass case neck (units of square inches) exposed to that tensile force. This cross-sectional area will clearly vary dependent on the [U]length[/U] of the case neck, the [U]depth the bullet is seated into the case neck[/U] (partially or through the entire length of case neck), and lastly, the [U]thickness of the brass[/U] case neck wall in the contact area with the seated bullet. These [U]three[/U] pertinent cartridge case neck criteria affect the case neck tensile force required to exceed the tensile yield strength of the brass case neck. These just serve as examples of why I stated, I think it's more complicated than that. I'll try to experiment with one of my ultrasonically cleaned cartridge cases tonight, because the higher coefficient of friction with one of these cases should exhibit additional bullet pulling force, compared to a lubricated case neck, under added neck tension. Although I have to add, my opinion is a by-product of my prior experiences prepping cases, seating bullets, and pulling bullets. And then trying to gauge the necessity of resizing the necks again prior to seating a bullet in the cartridge case the second time, based exclusively on the press handle resistance to seating/pulling the bullet the second time around. [/QUOTE]
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Reloading
Quick question on pulling bullets
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