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Scope leveling idea
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<blockquote data-quote="nksmfamjp" data-source="post: 1974817" data-attributes="member: 1951"><p>I'm not sure how each manufacturer does their datum scheme, but they are going to have a datum scheme like bolt bore axis and action face to hold the action. Then they are going to cut the outer shape off that. you want actions with minimal polishing. The polishing is where non-custom actions get out of whack. Given this, I like to get my bases level and flat to each other and set that as my flat to level off of. I do this with a 1 pc too. Just get the screws so they are holding the base under light friction and tap until evenly level. Then I level that to make the rifle level.</p><p></p><p></p><p></p><p>Given unlimited resources, I would develop a 25 yd bore optic with a crosshair and an electronic level accurate enough to limit angular variation error to 1/10 of an accurate rifles best 1000 yd group. It would slide into the action bore axis and lock. Then adjust to make muzzle concentric to the tool. That defines the bore axis.</p><p></p><p>Then set a tall target perfectly vertical by electronic level at 25 yards.</p><p></p><p>Then place the bore optic's crosshair on the vertical line of the tall target.</p><p></p><p>Then rotate the rifle until the new optically centered riflescope's reticle center and the bore optics center are on the tall targets vertical line.</p><p></p><p>Not the bore center and optic center are on the same vertical line. Next align the reticle to this line. Then lock down the scope rings so it won't move.</p><p></p><p>Last confirm turret alignment at 0 and plus 10 mils (1000 yd offset). Adjust as desired.</p><p></p><p>Since this idea only requires a bore centerline, I think it could be done with a bore centered laser, instead of the unknown bore optic. I haven't seen a bore centered laser that I'd trust. Have you?</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 1974817, member: 1951"] I‘m not sure how each manufacturer does their datum scheme, but they are going to have a datum scheme like bolt bore axis and action face to hold the action. Then they are going to cut the outer shape off that. you want actions with minimal polishing. The polishing is where non-custom actions get out of whack. Given this, I like to get my bases level and flat to each other and set that as my flat to level off of. I do this with a 1 pc too. Just get the screws so they are holding the base under light friction and tap until evenly level. Then I level that to make the rifle level. Given unlimited resources, I would develop a 25 yd bore optic with a crosshair and an electronic level accurate enough to limit angular variation error to 1/10 of an accurate rifles best 1000 yd group. It would slide into the action bore axis and lock. Then adjust to make muzzle concentric to the tool. That defines the bore axis. Then set a tall target perfectly vertical by electronic level at 25 yards. Then place the bore optic’s crosshair on the vertical line of the tall target. Then rotate the rifle until the new optically centered riflescope’s reticle center and the bore optics center are on the tall targets vertical line. Not the bore center and optic center are on the same vertical line. Next align the reticle to this line. Then lock down the scope rings so it won’t move. Last confirm turret alignment at 0 and plus 10 mils (1000 yd offset). Adjust as desired. Since this idea only requires a bore centerline, I think it could be done with a bore centered laser, instead of the unknown bore optic. I haven’t seen a bore centered laser that I’d trust. Have you? [/QUOTE]
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