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<blockquote data-quote="MontanaRifleman" data-source="post: 792141" data-attributes="member: 11717"><p>What I do is...</p><p></p><p>Mount the scope in the rings and snug them up allowing enough play to rotate the scope for adjustment.</p><p></p><p>Set up a table about 30 ft from a plum line. or as close to the plum line as my scope will focus on the line, and set the rifle up with rear sand bags to keep it stable.</p><p></p><p>I remove the bolt and sight down the bore to align the bore to the plumb line. I basically split the bore with the plumb line by sight. </p><p></p><p>Then I rotate the scope until the windage reticle is parallel with the plumb line, then align the windage reticle to the plumb line. This puts my camber and bore in the same sight plain (line of sight) as my scope.</p><p></p><p>Then I tighten down the ring screws incrementally and double check the bore and reticle alignment to the plum line. This usually takes a few minutes because tightening the screws twists the scope left and right.</p><p></p><p>Once the ring screws are tight I mount the level. (I use the Sinclair anti-cant level) I recheck the bore and reticle alignment to make sure everything is plumb. Then I tighten the level screws the same way I did the ring screws, ensuring the bubble stays centered in the process with bore and windage reticle aligned to the plumb line.</p><p></p><p>There are 2 basic errors induced if you don't get things right. 1- if your scope is not aligned with your bore, then your bullet will not travel in the same path as your scope's LOS. 2- If your scope is not level (plumbed to gravity) then when you dial in your elevations your POA will wander from your intended POI.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 792141, member: 11717"] What I do is... Mount the scope in the rings and snug them up allowing enough play to rotate the scope for adjustment. Set up a table about 30 ft from a plum line. or as close to the plum line as my scope will focus on the line, and set the rifle up with rear sand bags to keep it stable. I remove the bolt and sight down the bore to align the bore to the plumb line. I basically split the bore with the plumb line by sight. Then I rotate the scope until the windage reticle is parallel with the plumb line, then align the windage reticle to the plumb line. This puts my camber and bore in the same sight plain (line of sight) as my scope. Then I tighten down the ring screws incrementally and double check the bore and reticle alignment to the plum line. This usually takes a few minutes because tightening the screws twists the scope left and right. Once the ring screws are tight I mount the level. (I use the Sinclair anti-cant level) I recheck the bore and reticle alignment to make sure everything is plumb. Then I tighten the level screws the same way I did the ring screws, ensuring the bubble stays centered in the process with bore and windage reticle aligned to the plumb line. There are 2 basic errors induced if you don't get things right. 1- if your scope is not aligned with your bore, then your bullet will not travel in the same path as your scope's LOS. 2- If your scope is not level (plumbed to gravity) then when you dial in your elevations your POA will wander from your intended POI. [/QUOTE]
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