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Hunting
Long Range Hunting & Shooting
Scope leveling idea
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<blockquote data-quote="Jeffpatton00" data-source="post: 1973804" data-attributes="member: 97649"><p>You're right, circles have no inherent level. However, they do have a centerpoint. You say "... the scope is true to gravity and perpendicular" and here's where I get confused, because we seem to be dealing with multiple (and potentially erroneous) definitions of "perpendicular". As a thought test, imagine a setup where the scope is rotated a little, and if you extended the reticle's vertical axis, it would miss the bore's centerline. When you shoot you could unconsciously rotate the rifle slightly and the scope's vertical axis would be perpendicular to gravity, as you mentioned, but out of alignment with rifle's bore. The more elevation you apply to the scope, the further off the POI would get. It seems to be that the only requirement for scope leveling is to get the reticle's vertical axis to pass through the bore's centerpoint, and absent problems with scope tracking, all POI changes will occur along this line. Again, I'm testing my understanding, am I missing something key here?</p></blockquote><p></p>
[QUOTE="Jeffpatton00, post: 1973804, member: 97649"] You're right, circles have no inherent level. However, they do have a centerpoint. You say "... the scope is true to gravity and perpendicular" and here's where I get confused, because we seem to be dealing with multiple (and potentially erroneous) definitions of "perpendicular". As a thought test, imagine a setup where the scope is rotated a little, and if you extended the reticle's vertical axis, it would miss the bore's centerline. When you shoot you could unconsciously rotate the rifle slightly and the scope's vertical axis would be perpendicular to gravity, as you mentioned, but out of alignment with rifle's bore. The more elevation you apply to the scope, the further off the POI would get. It seems to be that the only requirement for scope leveling is to get the reticle's vertical axis to pass through the bore's centerpoint, and absent problems with scope tracking, all POI changes will occur along this line. Again, I'm testing my understanding, am I missing something key here? [/QUOTE]
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