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Long Range Hunting & Shooting
What caliber for a sheep rifle?
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<blockquote data-quote="Brown Dog" data-source="post: 125300" data-attributes="member: 1622"><p>Kirby, BjLooper</p><p></p><p>I don't think TOF differences account for the almost 100% difference in Kirby's <em>computer predicted</em> drift....the roundnose would take about 14% longer to get to the target; but intuitively that isn't enough to double <em>computer predicted</em> drift</p><p></p><p>...I would suspect that the ballistic programs we're using are not considering the 'side aspect BC' of the bullets at all and so <em>computer predicted</em> drift is artificially exagerated in favour of the bullet with the best nose-on BC...</p><p></p><p>...I think it likely that the 'side aspect BC' of these 2 bullets is probably very similar....and that they would therefore undergo similar lateral accelerations.....albeit the roundnose for 14% longer.</p><p></p><p>It'd be interesting to learn how much the difference was if the 2 rounds were actually fired under those conditions. I would expect the roundnose to have more drift, but not the computer predicted 'double value' drift.</p><p></p><p>(but, I don't think any of us will be running out to do the test! /ubbthreads/images/graemlins/smile.gif...I'm trying to pack my kit ready to fly up to Scotland tomorrow for a couple of days stalking /ubbthreads/images/graemlins/cool.gif).</p><p></p><p>All the best</p><p></p><p>Matt</p><p></p><p>PS. Kirby; have you ever exported any of your work to the UK?</p></blockquote><p></p>
[QUOTE="Brown Dog, post: 125300, member: 1622"] Kirby, BjLooper I don't think TOF differences account for the almost 100% difference in Kirby's [i]computer predicted[/i] drift....the roundnose would take about 14% longer to get to the target; but intuitively that isn't enough to double [i]computer predicted[/i] drift ...I would suspect that the ballistic programs we're using are not considering the 'side aspect BC' of the bullets at all and so [i]computer predicted[/i] drift is artificially exagerated in favour of the bullet with the best nose-on BC... ...I think it likely that the 'side aspect BC' of these 2 bullets is probably very similar....and that they would therefore undergo similar lateral accelerations.....albeit the roundnose for 14% longer. It'd be interesting to learn how much the difference was if the 2 rounds were actually fired under those conditions. I would expect the roundnose to have more drift, but not the computer predicted 'double value' drift. (but, I don't think any of us will be running out to do the test! [img]/ubbthreads/images/graemlins/smile.gif[/img]...I'm trying to pack my kit ready to fly up to Scotland tomorrow for a couple of days stalking [img]/ubbthreads/images/graemlins/cool.gif[/img]). All the best Matt PS. Kirby; have you ever exported any of your work to the UK? [/QUOTE]
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What caliber for a sheep rifle?
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