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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bolt face diameter's
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<blockquote data-quote="J E Custom" data-source="post: 1450826" data-attributes="member: 2736"><p>Yes and no. Bolt faces vary between cartridges (300 NM is .585, 338 Lapua is .587 and the 416 Rigby is .590 so if you want the best fit and ejection, you should use the case head size of the cartridge to be used to open the bolt face up. Depending on the action, I recommend a minimum of case head diameter + .005 and a maximum of case head diameter + .010. you want just enough clearance to allow the ejector to push the case out and not bind. Two much clearance and you may have extractor overrides. </p><p></p><p>Most Rigby's have a bolt face diameter of .602 to .604 and if used for a Norma would give you almost .015 thousandths case head clearance. The Lapua and the Norma are only .002 thousandths different and could be interchangeable but if you are cutting a new</p><p>300 Norma bolt face use the Norma dimension as a base line + .005 to .010 thousandths for best fit and function.</p><p></p><p>Just My opinion</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1450826, member: 2736"] Yes and no. Bolt faces vary between cartridges (300 NM is .585, 338 Lapua is .587 and the 416 Rigby is .590 so if you want the best fit and ejection, you should use the case head size of the cartridge to be used to open the bolt face up. Depending on the action, I recommend a minimum of case head diameter + .005 and a maximum of case head diameter + .010. you want just enough clearance to allow the ejector to push the case out and not bind. Two much clearance and you may have extractor overrides. Most Rigby's have a bolt face diameter of .602 to .604 and if used for a Norma would give you almost .015 thousandths case head clearance. The Lapua and the Norma are only .002 thousandths different and could be interchangeable but if you are cutting a new 300 Norma bolt face use the Norma dimension as a base line + .005 to .010 thousandths for best fit and function. Just My opinion J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bolt face diameter's
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