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Rifles, Reloading, Optics, Equipment
Reloading
Cocentric bullet seating
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<blockquote data-quote="ricka0" data-source="post: 60439" data-attributes="member: 3086"><p><strong>axial symmetery and Bersin</strong></p><p></p><p>[ QUOTE ]</p><p> I do believe the barrel can and does straighten out the bullet </p><p></p><p>[/ QUOTE ] </p><p>the physics of this is well understood and measured. It's not the simple bullet straightening out - it's how the bullet deforms into the lands as it seals - you want this deformation to be axially symmetric.</p><p></p><p> <a href="http://www.bersin.info/english/startseite_e/startseite.htm" target="_blank">Check out the Bersin runnout tool</a> - I'm going to get one</p><p></p><p>All the BR guys I know only use custom made dies (from fired brass)</p><p>Skip Talbot - the world champ at 1000 yard 50 BMG shooting had a good tip - when he seats his bullets - if there is any runnout he rotates the cartridge 120 deg then reseats it (repeat again if necessary) </p><p>I think Skip also uses the bersin tool</p><p> <img src="http://www.bersin.info/english/startseite_e/images/bench_rest_tool.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="ricka0, post: 60439, member: 3086"] [b]axial symmetery and Bersin[/b] [ QUOTE ] I do believe the barrel can and does straighten out the bullet [/ QUOTE ] the physics of this is well understood and measured. It's not the simple bullet straightening out - it's how the bullet deforms into the lands as it seals - you want this deformation to be axially symmetric. [url="http://www.bersin.info/english/startseite_e/startseite.htm"]Check out the Bersin runnout tool[/url] - I'm going to get one All the BR guys I know only use custom made dies (from fired brass) Skip Talbot - the world champ at 1000 yard 50 BMG shooting had a good tip - when he seats his bullets - if there is any runnout he rotates the cartridge 120 deg then reseats it (repeat again if necessary) I think Skip also uses the bersin tool [img]http://www.bersin.info/english/startseite_e/images/bench_rest_tool.jpg[/img] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Cocentric bullet seating
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