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Extreme Long Range Hunting & Shooting (ELR)
For ELR what constitutes a good zero?
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<blockquote data-quote="Professor Doolittle" data-source="post: 2466198" data-attributes="member: 118902"><p>It just occurred to me that the practice of taking a single shot to test the zero doesn't make any sense if you care about accuracy.</p><p></p><p>the way I was taught:</p><ol> <li data-xf-list-type="ol">shoot a group at 100 yards</li> <li data-xf-list-type="ol">find the center of the group</li> <li data-xf-list-type="ol">zero the scope to this data</li> <li data-xf-list-type="ol">take a single shot to test the zero near bullseye</li> </ol><p>But that single shot at the end isn't an adequate test, it has to be another full group with the center now on the point of aim. A single bullet dead on the bullseye is misleading because every bullet is part of a statistical dispersion and that one bullet may not represent the group's center even though it looked great. </p><p></p><p>If you only care about a rough zero I guess that's fine but in my case I was trying to adjust Hornady's 4DOF axial form factor, but that feature is to address a difference of like a quarter inch in a 600 yard shot. If the zero is not perfect than axial form factor is just compensating for poor zero.</p></blockquote><p></p>
[QUOTE="Professor Doolittle, post: 2466198, member: 118902"] It just occurred to me that the practice of taking a single shot to test the zero doesn't make any sense if you care about accuracy. the way I was taught: [LIST=1] [*]shoot a group at 100 yards [*]find the center of the group [*]zero the scope to this data [*]take a single shot to test the zero near bullseye [/LIST] But that single shot at the end isn't an adequate test, it has to be another full group with the center now on the point of aim. A single bullet dead on the bullseye is misleading because every bullet is part of a statistical dispersion and that one bullet may not represent the group's center even though it looked great. If you only care about a rough zero I guess that's fine but in my case I was trying to adjust Hornady's 4DOF axial form factor, but that feature is to address a difference of like a quarter inch in a 600 yard shot. If the zero is not perfect than axial form factor is just compensating for poor zero. [/QUOTE]
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For ELR what constitutes a good zero?
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