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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
60* or 90*, preference? One better than the other?
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<blockquote data-quote="Fiftydriver" data-source="post: 2587891" data-attributes="member: 10"><p>90 degree bolt will have more mechanical extraction camming action then a 60 degree so if your using a chambering that has a minimum body taper case, this can be critical for good extraction.</p><p></p><p>scope clearance these days is really not an issue with any modern 90 degree bolt.</p><p></p><p>looking at the actual receiver strength, the three lug design makes the actual receiver strength an issue. I have seen several browning rifles that smiths have clamped to hard in receiver wrenches crack at the very bottom of the front ring because of the thin steel caused by the bottom bolt lug way.</p><p></p><p>for me it comes down to the mechanical extraction camming stroke and there is no comparision between the two. For big cartridges with lots of case baring surface to the chamber, 90 is always my choice. When i designed my Raptor receiver it was always a 90.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 2587891, member: 10"] 90 degree bolt will have more mechanical extraction camming action then a 60 degree so if your using a chambering that has a minimum body taper case, this can be critical for good extraction. scope clearance these days is really not an issue with any modern 90 degree bolt. looking at the actual receiver strength, the three lug design makes the actual receiver strength an issue. I have seen several browning rifles that smiths have clamped to hard in receiver wrenches crack at the very bottom of the front ring because of the thin steel caused by the bottom bolt lug way. for me it comes down to the mechanical extraction camming stroke and there is no comparision between the two. For big cartridges with lots of case baring surface to the chamber, 90 is always my choice. When i designed my Raptor receiver it was always a 90. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
60* or 90*, preference? One better than the other?
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