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Cocentric bullet seating

 
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  #22  
Old 01-25-2005, 08:47 PM
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Join Date: Aug 2004
Location: utah
Posts: 302
Re: Cocentric bullet seating

Lassie,
You must have some awesome weed in Oklahoma.
B
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  #23  
Old 01-25-2005, 11:42 PM
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Join Date: Nov 2004
Location: GF Montana
Posts: 467
axial symmetery and Bersin

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I do believe the barrel can and does straighten out the bullet

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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.

Check out the Bersin runnout tool - 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
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  #24  
Old 01-25-2005, 11:44 PM
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Join Date: Nov 2004
Location: GF Montana
Posts: 467
ALL dies with expander balls need tuning

[ QUOTE ]
ALL dies with expander balls need tuning

[/ QUOTE ]
Y not do what all the BR guys do - remove the friggen thing?
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