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Rifles, Reloading, Optics, Equipment
Gunsmithing
Dakota bolt face compatibility
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<blockquote data-quote="J E Custom" data-source="post: 1363994" data-attributes="member: 2736"><p>When Remington designed the RUM, they decided to use the Jefferies case (The same as the Dakota) but rather than change all the bolt face diameters to fit it they simply changed the rim diameter of the 404 case to fit all of their bolts. The Dakota will/should not fit in a standard magnum (RUM) bolt face. </p><p></p><p>In order to extract well, the bolt face must have .002 minimum to .005 thousandths maximum clearance more than the case head. any more clearance, and the case head will/can move away from the extractor and disengage while still in the action.</p><p></p><p>If your Dakota cases are .540, the bolt face is at least .542 or larger</p><p>and would give you .010 or more case head clearance with the RUM Case. This would be to much for normal function.</p><p></p><p>The Dakota is bigger unfortunately and will never perform proper extraction with RUM cases. Sorry, but It is what it is.</p><p></p><p>PS: I once tried a different size case in a bolt to see if it would function, that had less than .007 thousandths clearance, and as soon as the case backed out of the chamber just a little, the extractor released it (Every time) and it dropped into action and had to be cleared to operate the bolt.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1363994, member: 2736"] When Remington designed the RUM, they decided to use the Jefferies case (The same as the Dakota) but rather than change all the bolt face diameters to fit it they simply changed the rim diameter of the 404 case to fit all of their bolts. The Dakota will/should not fit in a standard magnum (RUM) bolt face. In order to extract well, the bolt face must have .002 minimum to .005 thousandths maximum clearance more than the case head. any more clearance, and the case head will/can move away from the extractor and disengage while still in the action. If your Dakota cases are .540, the bolt face is at least .542 or larger and would give you .010 or more case head clearance with the RUM Case. This would be to much for normal function. The Dakota is bigger unfortunately and will never perform proper extraction with RUM cases. Sorry, but It is what it is. PS: I once tried a different size case in a bolt to see if it would function, that had less than .007 thousandths clearance, and as soon as the case backed out of the chamber just a little, the extractor released it (Every time) and it dropped into action and had to be cleared to operate the bolt. J E CUSTOM [/QUOTE]
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Dakota bolt face compatibility
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