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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Canting - the right answer
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<blockquote data-quote="Brown Dog" data-source="post: 110524" data-attributes="member: 1622"><p>JBM,</p><p></p><p>Thanks for your patience! Totally understand your reasoning.</p><p></p><p>..I would have thought that my earlier powerpoint slides show that I'm singing off the same song sheet regarding cant producing Az and El changes /ubbthreads/images/graemlins/smile.gif.</p><p></p><p>….I think where my thinking has diverged (quite possibly due to an assumption on my part /ubbthreads/images/graemlins/blush.gif!) is in the practical application of this.</p><p></p><p>………clearly, if you set your sight at a 100yd zero, adopt the prone position and attempt to hit a target that is horizontally 500yds away from you all you'll do is carve mud furrows somewhere between you and the target. </p><p></p><p>………As such quantifying Az and El changes relating to canting the set 100yd QE, when used at 500yds, is not of much practical use.</p><p></p><p>……my point, (or my dissonance /ubbthreads/images/graemlins/confused.gif, or my reasoning problem /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/smile.gif) comes when (or if!) you are proposing to use the 100yd zero cant data whilst <em><strong>hitting</strong></em> a 500yd target (using your 100yd zero scope; either because the target is in a 4ft dip, or because you have aimed 'up' by 4ft) </p><p></p><p>….in that instance, the fact that the rifle/scope has a 100yd zero becomes irrelevant. The cant effect will relate to the 500yd TE and be the same as if the rifle were zeroed at 500 yds……the 'boreline' to'100yd zero scope angle' is no longer relevant, ( <em>if you're hitting the target and not ploughing furrows</em> ) the cant effect has to be calculated in relation to the fired TE at that target range.</p><p></p><p>….I think my reasoning was drawn this way because at some point someone mentioned using this data to aim off using dots on their reticle. </p><p></p><p>….apologies, the rabbit-hole was mine /ubbthreads/images/graemlins/smile.gif….</p></blockquote><p></p>
[QUOTE="Brown Dog, post: 110524, member: 1622"] JBM, Thanks for your patience! Totally understand your reasoning. ..I would have thought that my earlier powerpoint slides show that I’m singing off the same song sheet regarding cant producing Az and El changes [img]/ubbthreads/images/graemlins/smile.gif[/img]. ….I think where my thinking has diverged (quite possibly due to an assumption on my part [img]/ubbthreads/images/graemlins/blush.gif[/img]!) is in the practical application of this. ………clearly, if you set your sight at a 100yd zero, adopt the prone position and attempt to hit a target that is horizontally 500yds away from you all you’ll do is carve mud furrows somewhere between you and the target. ………As such quantifying Az and El changes relating to canting the set 100yd QE, when used at 500yds, is not of much practical use. ……my point, (or my dissonance [img]/ubbthreads/images/graemlins/confused.gif[/img], or my reasoning problem [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/smile.gif[/img]) comes when (or if!) you are proposing to use the 100yd zero cant data whilst [i][b]hitting[/b][/i] a 500yd target (using your 100yd zero scope; either because the target is in a 4ft dip, or because you have aimed ‘up’ by 4ft) ….in that instance, the fact that the rifle/scope has a 100yd zero becomes irrelevant. The cant effect will relate to the 500yd TE and be the same as if the rifle were zeroed at 500 yds……the 'boreline' to'100yd zero scope angle' is no longer relevant, ( [i]if you're hitting the target and not ploughing furrows[/i] ) the cant effect has to be calculated in relation to the fired TE at that target range. ….I think my reasoning was drawn this way because at some point someone mentioned using this data to aim off using dots on their reticle. ….apologies, the rabbit-hole was mine [img]/ubbthreads/images/graemlins/smile.gif[/img]…. [/QUOTE]
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Canting - the right answer
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