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Long Range Hunting & Shooting
scope problem
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<blockquote data-quote="Teri Anne" data-source="post: 2393168" data-attributes="member: 118816"><p>If you adjust elevation and the windage changes the chances are the scope reticle is not mounted vertical to the bore. Because of this slight off center positioning whenever you raise or lower elevation the windage will change according to the amount the scope is off. This is extremely prevalent with tactical scopes if not mounted perfectly level in relation to the bore. To check this at preferably 100 yards put up a target, take a well aimed shot at your zero, then raise the elevation to what would be a 400 or 500 yard shot. Carefully take another shot. The second shot (or group if you prefer) should be straight up from the first without any change in windage left or right. Bubble levels and bore sights will not be accurate enough to perfect vertical movement unless you are very lucky. I use bubble levels and a laser bore sighter to get close then make the final adjustment using a Barska Boresighter. It is a kit containing mandrels for the various calibers and a grid panel that attaches to the mandrel. It is adjusted for vertical using the cross hairs of the scope. If the scope is not exactly vertical the crosshairs will not line up with the grid. Adjust the scope so the crosshairs align up with the vertical grid lines and now you have a scope that should track perfectly up and down without chnging the windage. This is very important for those of you who shoot at long distances where a half inch of windage drift when going out to 1000 yards means a 5 inch difference in the point of impact.</p></blockquote><p></p>
[QUOTE="Teri Anne, post: 2393168, member: 118816"] If you adjust elevation and the windage changes the chances are the scope reticle is not mounted vertical to the bore. Because of this slight off center positioning whenever you raise or lower elevation the windage will change according to the amount the scope is off. This is extremely prevalent with tactical scopes if not mounted perfectly level in relation to the bore. To check this at preferably 100 yards put up a target, take a well aimed shot at your zero, then raise the elevation to what would be a 400 or 500 yard shot. Carefully take another shot. The second shot (or group if you prefer) should be straight up from the first without any change in windage left or right. Bubble levels and bore sights will not be accurate enough to perfect vertical movement unless you are very lucky. I use bubble levels and a laser bore sighter to get close then make the final adjustment using a Barska Boresighter. It is a kit containing mandrels for the various calibers and a grid panel that attaches to the mandrel. It is adjusted for vertical using the cross hairs of the scope. If the scope is not exactly vertical the crosshairs will not line up with the grid. Adjust the scope so the crosshairs align up with the vertical grid lines and now you have a scope that should track perfectly up and down without chnging the windage. This is very important for those of you who shoot at long distances where a half inch of windage drift when going out to 1000 yards means a 5 inch difference in the point of impact. [/QUOTE]
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