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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Maths question for someone with brains ?
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<blockquote data-quote="Down Under Hunter" data-source="post: 197304" data-attributes="member: 8486"><p>Dave,</p><p></p><p>One other little curve ball I forgot to mention. When I shot the rifle for its 100 m zero I did not pay enough close attention to the large black spot on the target. In fact the 100 M zero was 1" high.</p><p></p><p>Due to time constraints and family demands I have little time to shoot the rifle this week to check this stuff, but after reading your posts I have been running some numbers on exbal. Just trying to see if all the math conclusively proves that the scope clicks are inaccurate and the 1 " high 100 M zero is where it all is going wrong.</p><p></p><p>I unfortunately dont have the time to play with the gun too much as hunting season starts in one week so I'll run with the numbers below. I wont be shooting past 500 M in this season anyway. Then I will make all corrections needed for the rest of the year.</p><p></p><p>Facts are these</p><p></p><p>1. When at 100 lasered meters and dialling 20 moa up I have 25 " of group elevation. ( This is above the 1 " high 100 M group )</p><p></p><p>2. Scope and mounts are good.</p><p></p><p>3. Groups are super.</p><p></p><p>I need the following confirmed ups on a NXS 5-22</p><p></p><p>200m- 1.25 up</p><p></p><p>300m- 3.25</p><p></p><p>400- 5.25</p><p></p><p>530- 8.5 up</p><p></p><p>Can anyone tell me what my zero would be being 1 " high at 100 M ?</p><p></p><p> 338 edge (2870 fps estimate) 300 smk .768 bc. 20 ft above sea level BP 30.0, RH 46 % temp 76 f ? 2.1 " above bore. These numbers get me close.</p><p></p><p>If I can work out my the correct zero, stretch the sight in zero on exbal to this and see where the numbers were at ? </p><p></p><p>If I was close, I thought I'd do as Jon A suggested and divide my exbal dope with the 1.09 suggested and see if I end up with the correct ups listed above ? Hopefully this will then support the scope clicks being wrong ?</p><p></p><p>Did that make any sense ?</p><p></p><p>I know I'm trying to cover too many bases at once, but I'm just trying to satisfy myself I have it nailed down now.</p><p></p><p>Maybe some of you boys who have more experience with exbal than me can see if I am thinking this through clearly ?</p><p></p><p>Thanks all for your welcomed assistance. I have more calculations and pieces of paper in front of me than you can imagine !</p><p></p><p>Happy Easter all !</p><p></p><p>DUH</p></blockquote><p></p>
[QUOTE="Down Under Hunter, post: 197304, member: 8486"] Dave, One other little curve ball I forgot to mention. When I shot the rifle for its 100 m zero I did not pay enough close attention to the large black spot on the target. In fact the 100 M zero was 1" high. Due to time constraints and family demands I have little time to shoot the rifle this week to check this stuff, but after reading your posts I have been running some numbers on exbal. Just trying to see if all the math conclusively proves that the scope clicks are inaccurate and the 1 " high 100 M zero is where it all is going wrong. I unfortunately dont have the time to play with the gun too much as hunting season starts in one week so I'll run with the numbers below. I wont be shooting past 500 M in this season anyway. Then I will make all corrections needed for the rest of the year. Facts are these 1. When at 100 lasered meters and dialling 20 moa up I have 25 " of group elevation. ( This is above the 1 " high 100 M group ) 2. Scope and mounts are good. 3. Groups are super. I need the following confirmed ups on a NXS 5-22 200m- 1.25 up 300m- 3.25 400- 5.25 530- 8.5 up Can anyone tell me what my zero would be being 1 " high at 100 M ? 338 edge (2870 fps estimate) 300 smk .768 bc. 20 ft above sea level BP 30.0, RH 46 % temp 76 f ? 2.1 " above bore. These numbers get me close. If I can work out my the correct zero, stretch the sight in zero on exbal to this and see where the numbers were at ? If I was close, I thought I'd do as Jon A suggested and divide my exbal dope with the 1.09 suggested and see if I end up with the correct ups listed above ? Hopefully this will then support the scope clicks being wrong ? Did that make any sense ? I know I'm trying to cover too many bases at once, but I'm just trying to satisfy myself I have it nailed down now. Maybe some of you boys who have more experience with exbal than me can see if I am thinking this through clearly ? Thanks all for your welcomed assistance. I have more calculations and pieces of paper in front of me than you can imagine ! Happy Easter all ! DUH [/QUOTE]
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Maths question for someone with brains ?
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