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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
How accurate are angle cosine indicators?
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<blockquote data-quote="Jeff In TX" data-source="post: 17427" data-attributes="member: 1522"><p>Your are correct a 600 yard shot at a 35 degree angle is around 490 yards.</p><p></p><p>The point I was trying to make is the bullet will actually travel 600 yards to the target, but because of the anfle it is actually a 490 yard shot. Time of flight is almost 20 percent longer. Using a cosine only tells you the shot is 490 yards. Atleast that's how we were taught in our tactical training. </p><p></p><p>According to my RSI ballistic Lab. There is around 3 MOA (roughly 15 inches) difference between using a cosine verses calculating the angle of fire and figuring in the actual time of flight for the bullet.</p><p></p><p>I hope that makes better sense. </p><p></p><p>Anyhow, I'm off to stuff my self full of Turkey and fixen's.</p><p></p><p>God Bless everyone and I hope everyone enjoys their Thanksgiving!</p></blockquote><p></p>
[QUOTE="Jeff In TX, post: 17427, member: 1522"] Your are correct a 600 yard shot at a 35 degree angle is around 490 yards. The point I was trying to make is the bullet will actually travel 600 yards to the target, but because of the anfle it is actually a 490 yard shot. Time of flight is almost 20 percent longer. Using a cosine only tells you the shot is 490 yards. Atleast that's how we were taught in our tactical training. According to my RSI ballistic Lab. There is around 3 MOA (roughly 15 inches) difference between using a cosine verses calculating the angle of fire and figuring in the actual time of flight for the bullet. I hope that makes better sense. Anyhow, I'm off to stuff my self full of Turkey and fixen's. God Bless everyone and I hope everyone enjoys their Thanksgiving! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
How accurate are angle cosine indicators?
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