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Long Range Hunting & Shooting
ballistic software question
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<blockquote data-quote="BryanLitz" data-source="post: 489737" data-attributes="member: 7848"><p>Nik,</p><p></p><p>I think you're making a common mistake for this analysis.</p><p></p><p>When you run the ballistics program with a 250 yard zero, you're forcing it to be zeroed at 250 yards. The difference in trajectory that you list above is not the actual difference you would see with a rifle that you zero at 700' and take to 6000'.</p><p></p><p>When you zero a rifle at 250 yards at 700' elevation, that 'zero' is a specific mechanical relationship (angle) between the line of sight and the bore. Now when you take it to 6000', that same specific mechanical relationship will not result in a trajectory that's zeroed at 250 yards, due to the vastly different atmosphere. </p><p></p><p>When you run the program and tell it to 'zero' at 250 yards for both altitudes, it's calculating and applying a different mechanical relationship between the line of sight and bore that results in a zeroed trajectory at each altitude (not what happens with a real rifle).</p><p></p><p>It's getting late for me, I hope this makes sense and I'm not misunderstanding your analysis.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 489737, member: 7848"] Nik, I think you're making a common mistake for this analysis. When you run the ballistics program with a 250 yard zero, you're forcing it to be zeroed at 250 yards. The difference in trajectory that you list above is not the actual difference you would see with a rifle that you zero at 700' and take to 6000'. When you zero a rifle at 250 yards at 700' elevation, that 'zero' is a specific mechanical relationship (angle) between the line of sight and the bore. Now when you take it to 6000', that same specific mechanical relationship will not result in a trajectory that's zeroed at 250 yards, due to the vastly different atmosphere. When you run the program and tell it to 'zero' at 250 yards for both altitudes, it's calculating and applying a different mechanical relationship between the line of sight and bore that results in a zeroed trajectory at each altitude (not what happens with a real rifle). It's getting late for me, I hope this makes sense and I'm not misunderstanding your analysis. -Bryan [/QUOTE]
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