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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
help please
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<blockquote data-quote="FearNoWind" data-source="post: 985292" data-attributes="member: 50867"><p>The amount of "drop" of a bullet over distance is not linear; it is exponential. Knowing how much your bullet drops at 200, 300, 400 yards by shooting targets at those distances using a constant POA will allow you to determine how much input you'll need to adjust the scope for those distances but it will not be accurate (unless you can shoot groups at .25 MOA at those distances). In order to develop a formula for calculating the information you are looking for you need some solid data - guess work will only support the GIGO theory.</p><p>However, if you do shoot 200, 300, etc. targets and collect the diminishing point of impact distances, just remember that your scope's "clicks" are cumulative. If your scope adjusts 1/4 inch per "click" at 100 yards that one "click" will change your POI 1/2 inch at 200 yards, 3/4 inch at 300 yards, etc.</p><p>I'd suggest you read what you can find on MOA factors for scope adjustment and get a good book on ballistics. </p><p>Here's the best one I'm familiar with:</p><p><a href="http://www.amazon.com/dp/0615452566/?tag=lrhmag19-20" target="_blank">Amazon.com: Applied Ballistics for Long Range Shooting : Understanding the elements and application of external ballistics for successful long range target shooting and Hunting (9780615452562): Bryan Litz: Books</a></p></blockquote><p></p>
[QUOTE="FearNoWind, post: 985292, member: 50867"] The amount of "drop" of a bullet over distance is not linear; it is exponential. Knowing how much your bullet drops at 200, 300, 400 yards by shooting targets at those distances using a constant POA will allow you to determine how much input you'll need to adjust the scope for those distances but it will not be accurate (unless you can shoot groups at .25 MOA at those distances). In order to develop a formula for calculating the information you are looking for you need some solid data - guess work will only support the GIGO theory. However, if you do shoot 200, 300, etc. targets and collect the diminishing point of impact distances, just remember that your scope's "clicks" are cumulative. If your scope adjusts 1/4 inch per "click" at 100 yards that one "click" will change your POI 1/2 inch at 200 yards, 3/4 inch at 300 yards, etc. I'd suggest you read what you can find on MOA factors for scope adjustment and get a good book on ballistics. Here's the best one I'm familiar with: [URL='http://www.amazon.com/dp/0615452566/?tag=lrhmag19-20']Amazon.com: Applied Ballistics for Long Range Shooting : Understanding the elements and application of external ballistics for successful long range target shooting and Hunting (9780615452562): Bryan Litz: Books[/url] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
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