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Rifles, Reloading, Optics, Equipment
Reloading
Clean inside case neck ?
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<blockquote data-quote="Pdvdh" data-source="post: 1341628" data-attributes="member: 4191"><p>Reducing the coefficient of friction between the bullet and the case neck will reduce the pressure required to start the bullet out of the case neck, no matter how you describe the method of bullet release from the case neck. </p><p>On the one hand you expressed concern that the bullet could shift position in the casing under recoil if the friction between the bullet and case neck is reduced sufficiently, while the cartridge is in the magazine. On the other hand you're stating that friction between bullet and the case neck has no influence on the pressure required to initiate bullet movement. How do you reconcile those two stated positions?</p><p></p><p>Now I understand, I believe, your description of how case neck tension is released as the case neck expands due to increasing internal case pressure. But to completely dismiss the coefficient of friction between bullet and case neck as having zero influence on the pressure necessary to initiate bullet movement is an oversight, or an exaggeration of the primary versus secondary affects on minimum pressures required to initiate bullet movement from the case neck.</p><p>Take the coefficient of friction down to zero. Do you claim this has no effect? The bullet falls out of the case neck if the loaded cartridge is held pointed down toward the ground while held by the case head. Still no affect on the internal case pressure required to initiate bullet release?</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1341628, member: 4191"] Reducing the coefficient of friction between the bullet and the case neck will reduce the pressure required to start the bullet out of the case neck, no matter how you describe the method of bullet release from the case neck. On the one hand you expressed concern that the bullet could shift position in the casing under recoil if the friction between the bullet and case neck is reduced sufficiently, while the cartridge is in the magazine. On the other hand you're stating that friction between bullet and the case neck has no influence on the pressure required to initiate bullet movement. How do you reconcile those two stated positions? Now I understand, I believe, your description of how case neck tension is released as the case neck expands due to increasing internal case pressure. But to completely dismiss the coefficient of friction between bullet and case neck as having zero influence on the pressure necessary to initiate bullet movement is an oversight, or an exaggeration of the primary versus secondary affects on minimum pressures required to initiate bullet movement from the case neck. Take the coefficient of friction down to zero. Do you claim this has no effect? The bullet falls out of the case neck if the loaded cartridge is held pointed down toward the ground while held by the case head. Still no affect on the internal case pressure required to initiate bullet release? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Clean inside case neck ?
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