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Bubble level for rifle
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<blockquote data-quote="dwm" data-source="post: 41002" data-attributes="member: 1136"><p>I propose that the rotation is about the centerline of the scope, IE the whole rifle rotates about the line of sight.</p><p></p><p>When the cross hair and rifle are at 0 degree cant, the windage is corrected to 0 error and the elevation is adjusted such that the curved trajectory causes the POI to intesect the POA at the desired range.</p><p></p><p>When rotated at an angle, the error in the windage is no longer 0, a component of the elevation is now being applied to the windage.</p><p></p><p>There is also error in the elevation, the resulting elevation will be less than the original elevation.</p><p></p><p>Rotate counter-clockwise and the POI will be low and to the left of POA.</p><p></p><p>A 90 degree rotation (cant) causes the entire amount of elevation to be applied to windage and the windage (0) to be applied to the elevation. (You could click the elevation into the windage knob and the windage into the elevation knob and shoot from a 90 degree cant!)</p><p></p><p>How about:</p><p></p><p> <img src="http://dwmeyer.com/WebPics/Annealled/Cant.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ 03-07-2004: Message edited by: dwm ]</p></blockquote><p></p>
[QUOTE="dwm, post: 41002, member: 1136"] I propose that the rotation is about the centerline of the scope, IE the whole rifle rotates about the line of sight. When the cross hair and rifle are at 0 degree cant, the windage is corrected to 0 error and the elevation is adjusted such that the curved trajectory causes the POI to intesect the POA at the desired range. When rotated at an angle, the error in the windage is no longer 0, a component of the elevation is now being applied to the windage. There is also error in the elevation, the resulting elevation will be less than the original elevation. Rotate counter-clockwise and the POI will be low and to the left of POA. A 90 degree rotation (cant) causes the entire amount of elevation to be applied to windage and the windage (0) to be applied to the elevation. (You could click the elevation into the windage knob and the windage into the elevation knob and shoot from a 90 degree cant!) How about: [img]http://dwmeyer.com/WebPics/Annealled/Cant.JPG[/img] [ 03-07-2004: Message edited by: dwm ] [/QUOTE]
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