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Long Range Hunting & Shooting
A little confused.
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<blockquote data-quote="Scot E" data-source="post: 572646" data-attributes="member: 10832"><p>At the distances we are talking, 50 -300 yards, errors in velocity, BC, scope height, incline and atmospheric conditions are not going to be the problem. They just make too little of a difference that close in to really be a factor. </p><p></p><p>Plus, if you are really zeroed at 275 then you have to be shooting low at 300 yards. So I would start there. Be sure to zero at 275 yards. Make sure your rangefinder is accurate and ranging in yards. I have thrown a meter measurement in before myself and screwed everything up. Adjust the parallax so you get no reticle jump at your zero range then don't change the magnification setting or parallax while you are sighting in at 275</p><p></p><p>My guess is that it is either </p><p>1. scope click value errors or a defect. (verify that your scope clicks are working properly)</p><p>2. A bad parallax issue (check parallax issues)</p><p>3. You aren't zeroed at the correct distance. (verify zero)</p><p>4. A combination of the above.</p><p></p><p>When you are zeroed at 275 you can also do some other tests to make sure your scope is up to snuff. Once zeroed shoot a group at high and low power to make sure POI isn't changing as you adjust the magnification. This can happen with a QC issue or with scope failure.</p><p></p><p>Also, adjust the parallax to 100 yards and maybe infinity and see if there is a drastic change in POI. When a scope's AO goes haywire I have seen it affect all kinds of different issues. And IME a scope's AO can be one of the weak links to today's scopes. </p><p></p><p>HTH,</p><p></p><p>Scot E.</p></blockquote><p></p>
[QUOTE="Scot E, post: 572646, member: 10832"] At the distances we are talking, 50 -300 yards, errors in velocity, BC, scope height, incline and atmospheric conditions are not going to be the problem. They just make too little of a difference that close in to really be a factor. Plus, if you are really zeroed at 275 then you have to be shooting low at 300 yards. So I would start there. Be sure to zero at 275 yards. Make sure your rangefinder is accurate and ranging in yards. I have thrown a meter measurement in before myself and screwed everything up. Adjust the parallax so you get no reticle jump at your zero range then don't change the magnification setting or parallax while you are sighting in at 275 My guess is that it is either 1. scope click value errors or a defect. (verify that your scope clicks are working properly) 2. A bad parallax issue (check parallax issues) 3. You aren't zeroed at the correct distance. (verify zero) 4. A combination of the above. When you are zeroed at 275 you can also do some other tests to make sure your scope is up to snuff. Once zeroed shoot a group at high and low power to make sure POI isn't changing as you adjust the magnification. This can happen with a QC issue or with scope failure. Also, adjust the parallax to 100 yards and maybe infinity and see if there is a drastic change in POI. When a scope's AO goes haywire I have seen it affect all kinds of different issues. And IME a scope's AO can be one of the weak links to today's scopes. HTH, Scot E. [/QUOTE]
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