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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Box Test - what does this mean?
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<blockquote data-quote="LouBoyd" data-source="post: 566370" data-attributes="member: 9253"><p>The thing which would disturb me about that target are that the two lower groups are noticeably lower on the target than they should be. I assume you calculated the number of moa/click to determine how many clicks to use. Certainly the vertical clicks in your scope are larger in angle then the horizontal clicks, which they should not be, and the lower horizontal clicks are larger than the upper horizontal clicks, though not by as much. </p><p></p><p>With only 3 shot groups it's hard to tell if those deviations are real or just small number statistics. Some scopes do become "loose" when used near the limits of their movement range, usually on the side where the springs are most extended. Also, a box test will be more sensitive to rifle canting in the corners than in the center, though I don't see evidence in the target that's happening. It does appear that the scope is returning to zero properly, </p><p></p><p>In your other test targets was the lower left group always largest and the upper right always best? Was the difference in the size of the click equally noticeable? </p><p>If so I think that's significant and points to a problem with the scope. That's why box tests need to be done. </p><p></p><p>There's a lot you didn't say in your post:</p><p>What range to the target</p><p>How large (in MOA, clicks, and inches on the target) are the sides of the box.</p><p>What make and model scope.</p><p>What rings and base</p><p>What rifle </p><p>What cartridge and bullet</p><p>What shooting style (benchrest, bags, prone, etc)</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 566370, member: 9253"] The thing which would disturb me about that target are that the two lower groups are noticeably lower on the target than they should be. I assume you calculated the number of moa/click to determine how many clicks to use. Certainly the vertical clicks in your scope are larger in angle then the horizontal clicks, which they should not be, and the lower horizontal clicks are larger than the upper horizontal clicks, though not by as much. With only 3 shot groups it's hard to tell if those deviations are real or just small number statistics. Some scopes do become "loose" when used near the limits of their movement range, usually on the side where the springs are most extended. Also, a box test will be more sensitive to rifle canting in the corners than in the center, though I don't see evidence in the target that's happening. It does appear that the scope is returning to zero properly, In your other test targets was the lower left group always largest and the upper right always best? Was the difference in the size of the click equally noticeable? If so I think that's significant and points to a problem with the scope. That's why box tests need to be done. There's a lot you didn't say in your post: What range to the target How large (in MOA, clicks, and inches on the target) are the sides of the box. What make and model scope. What rings and base What rifle What cartridge and bullet What shooting style (benchrest, bags, prone, etc) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Box Test - what does this mean?
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