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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="Gene" data-source="post: 566672" data-attributes="member: 7402"><p>The purpose of a box test is to check your scope for its tracking. Groups are not necessary. Before you start, your scope and rifle should be aligned properly so that reticule is not canted. Start by laying a small 1" bubble level on any flat surface, such as rifle action. At the same time, use a 6" or so 90 degree level to line up the butt plate. Your rifle should be laying in a solid rest to do this. Both bubbles should agree. Now go to the range and set rifle on a solid front and rear rest. If you can, have someone adjust in any direction while you hold rifle steady and watch movement of the reticule. Move reticule one minute at a time around the target corners at 100 yds. </p><p></p><p>BOX TEST:</p><p>I take a 2' level to the range to make sure the target is not canted. Then I hang a 2' string attached to a plum bob nearby. The vertical crosshairs should line up with the string. If not, loosen scope and rotate until it is. Take a few practice shots at 100 yds., and adjust scope to hit dead center. Start at upper left corner of a 1" square target; adjust scope 1 minute to right, fire a shot; adjust one minue down, fire one shot, and so on. Your fifth shot should be very close to the first shot, if you have an accurate rifle. Repeat this test on a second target. The five shots might be off the corners by a hair, depending on how accurate the rifle is. If shots are off more than 1/2" or so, you have a tracking problem.</p></blockquote><p></p>
[QUOTE="Gene, post: 566672, member: 7402"] The purpose of a box test is to check your scope for its tracking. Groups are not necessary. Before you start, your scope and rifle should be aligned properly so that reticule is not canted. Start by laying a small 1" bubble level on any flat surface, such as rifle action. At the same time, use a 6" or so 90 degree level to line up the butt plate. Your rifle should be laying in a solid rest to do this. Both bubbles should agree. Now go to the range and set rifle on a solid front and rear rest. If you can, have someone adjust in any direction while you hold rifle steady and watch movement of the reticule. Move reticule one minute at a time around the target corners at 100 yds. BOX TEST: I take a 2' level to the range to make sure the target is not canted. Then I hang a 2' string attached to a plum bob nearby. The vertical crosshairs should line up with the string. If not, loosen scope and rotate until it is. Take a few practice shots at 100 yds., and adjust scope to hit dead center. Start at upper left corner of a 1" square target; adjust scope 1 minute to right, fire a shot; adjust one minue down, fire one shot, and so on. Your fifth shot should be very close to the first shot, if you have an accurate rifle. Repeat this test on a second target. The five shots might be off the corners by a hair, depending on how accurate the rifle is. If shots are off more than 1/2" or so, you have a tracking problem. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Box Test - what does this mean?
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