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Rifles, Reloading, Optics, Equipment
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Cosine Indicator
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<blockquote data-quote="Guest" data-source="post: 57213"><p>Brent: I agree with you; the software programs are a bit more accurate. At least they are with Exbal. </p><p>Also, not to confuse the matter, however when the sun light is behind you, your shot will hit approx 1/4 moa low. To the right and it will impact approx 1/4 moa left and left, 1/4 moa right. Heavy overcast? Your bullet will impact 1/2 moa low. A medium (4-6 mph) tail wind? Bullet impact will be 1/2 moa low. Some of the finer attributes of Precision Shooting.</p><p></p><p>As far as how to mount the ACI... The bore of the barrel must be level. Once the ACI is mouinted, loosen the screw on the side an rotate the body as needed, until the 0 cosine lines up with the index mark. To level the bore of the barrel, pull your bolt out, place a bubble level on the inside rail (that the lugs ride on) until it is level. Then make the adjustment.</p></blockquote><p></p>
[QUOTE="Guest, post: 57213"] Brent: I agree with you; the software programs are a bit more accurate. At least they are with Exbal. Also, not to confuse the matter, however when the sun light is behind you, your shot will hit approx 1/4 moa low. To the right and it will impact approx 1/4 moa left and left, 1/4 moa right. Heavy overcast? Your bullet will impact 1/2 moa low. A medium (4-6 mph) tail wind? Bullet impact will be 1/2 moa low. Some of the finer attributes of Precision Shooting. As far as how to mount the ACI... The bore of the barrel must be level. Once the ACI is mouinted, loosen the screw on the side an rotate the body as needed, until the 0 cosine lines up with the index mark. To level the bore of the barrel, pull your bolt out, place a bubble level on the inside rail (that the lugs ride on) until it is level. Then make the adjustment. [/QUOTE]
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