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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist question?? 7WSM / 180 Bergers
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<blockquote data-quote="BryanLitz" data-source="post: 437879" data-attributes="member: 7848"><p>You can find dimensions on all Berger Bullets for planning chambers/throats at this address:</p><p><a href="http://bergerbullets.com/Quick%20Reference%20Sheets%209-23-10.pdf" target="_blank">http://bergerbullets.com/Quick Reference Sheets 9-23-10.pdf</a></p><p></p><p>Also, for the 168 and 180 VLD's, there are prints here:</p><p><a href="http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf" target="_blank">http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf</a></p><p></p><p>I would aim to have the bearing surface just ahead of the neck/shoulder junction when the bullet is seated ~.060" off the lands. This gives you the flexibility of going into or off the riflings while having enough of the bullet in the neck, and not seating it past the 'donut' (ring of thick brass that forms at the base of the neck after several resizings).</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 437879, member: 7848"] You can find dimensions on all Berger Bullets for planning chambers/throats at this address: [url]http://bergerbullets.com/Quick%20Reference%20Sheets%209-23-10.pdf[/url] Also, for the 168 and 180 VLD's, there are prints here: [url]http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf[/url] I would aim to have the bearing surface just ahead of the neck/shoulder junction when the bullet is seated ~.060" off the lands. This gives you the flexibility of going into or off the riflings while having enough of the bullet in the neck, and not seating it past the 'donut' (ring of thick brass that forms at the base of the neck after several resizings). -Bryan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist question?? 7WSM / 180 Bergers
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