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Rifles, Reloading, Optics, Equipment
Gunsmithing
When checking bolt-lug face surface % with a sharpie...
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<blockquote data-quote="ntsqd" data-source="post: 1644221" data-attributes="member: 93138"><p>I suspect this is more like a semi-oval bolt body than lugs or bumps. For the very esthetic reason that you mention. This is a very qwik and crude illustration, were I going to actually make such a bolt body it needs some refining:</p><p><img src="https://photos.smugmug.com/photos/i-4ZQDDTH/0/2eb2e545/L/i-4ZQDDTH-L.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>This is shown in battery. Note how there is some gap at the sides above and below the railways (most noticeable at the top-left rail corner), yet there is no gap at the top and bottom of the bolt body. To give some scale, I modeled this with a .750" bolt body OD at the high points, a 1.3" action OD, and used their .012" clearance value.</p><p></p><p>I said CNC grinder above, but it occurred to me that the cam grinders used to make engine cams could easily make this shape with no automated controls, and that one can find those grinders used from time to time.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 1644221, member: 93138"] I suspect this is more like a semi-oval bolt body than lugs or bumps. For the very esthetic reason that you mention. This is a very qwik and crude illustration, were I going to actually make such a bolt body it needs some refining: [IMG]https://photos.smugmug.com/photos/i-4ZQDDTH/0/2eb2e545/L/i-4ZQDDTH-L.jpg[/IMG] This is shown in battery. Note how there is some gap at the sides above and below the railways (most noticeable at the top-left rail corner), yet there is no gap at the top and bottom of the bolt body. To give some scale, I modeled this with a .750" bolt body OD at the high points, a 1.3" action OD, and used their .012" clearance value. I said CNC grinder above, but it occurred to me that the cam grinders used to make engine cams could easily make this shape with no automated controls, and that one can find those grinders used from time to time. [/QUOTE]
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Gunsmithing
When checking bolt-lug face surface % with a sharpie...
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