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Angle Shooting - Correcting For The Effects Of Gravity by Ward Brien
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<blockquote data-quote="cdoubleu" data-source="post: 303425" data-attributes="member: 18034"><p>Jap Hunter,</p><p> If you are having problems matching your trajectory these will be your biggest obstacles: Accurate muzzle velocity (backwards calculated from chronographed speed, and distance measured from the barrel), An accurate BC (not necessarily listed), and finally, insuring that your scope's click value is actually what it is advertised as. To check the adjustment value, zero your rifle at 100y/100m what ever you use as a standard, pick an aim point at the bottom of the target and in half or full turret revolutions verify the distance between group centers exactly what they should be in click values. Example: @100yds, 1MOA=1.047", change vertical adjustment up 10MOA=10.47", fire a group, hopefully your group is 10.5" high. This may take a tall target depending about your scope's elevation abilities, but an appropriate target (hung vertically with a plumb bob) will tell you wonders about your scope. </p><p> As previously mentioned, the difference of 1/3 of a degree of angle (20MOA) isn't going to make a noticiable difference in trajectory, even at 1000yds it's much smaller than even the best are able to shoot. You wouldn't be able to correct for it either because it is less than one click value on 0.25MOA or .1MIL adjustment scopes.</p></blockquote><p></p>
[QUOTE="cdoubleu, post: 303425, member: 18034"] Jap Hunter, If you are having problems matching your trajectory these will be your biggest obstacles: Accurate muzzle velocity (backwards calculated from chronographed speed, and distance measured from the barrel), An accurate BC (not necessarily listed), and finally, insuring that your scope's click value is actually what it is advertised as. To check the adjustment value, zero your rifle at 100y/100m what ever you use as a standard, pick an aim point at the bottom of the target and in half or full turret revolutions verify the distance between group centers exactly what they should be in click values. Example: @100yds, 1MOA=1.047", change vertical adjustment up 10MOA=10.47", fire a group, hopefully your group is 10.5" high. This may take a tall target depending about your scope's elevation abilities, but an appropriate target (hung vertically with a plumb bob) will tell you wonders about your scope. As previously mentioned, the difference of 1/3 of a degree of angle (20MOA) isn't going to make a noticiable difference in trajectory, even at 1000yds it's much smaller than even the best are able to shoot. You wouldn't be able to correct for it either because it is less than one click value on 0.25MOA or .1MIL adjustment scopes. [/QUOTE]
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Angle Shooting - Correcting For The Effects Of Gravity by Ward Brien
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