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Long Range Hunting & Shooting
Need help with 2285 yard shot.
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<blockquote data-quote="liltank" data-source="post: 356988" data-attributes="member: 13275"><p>Well this is my only theory. We all know that the 168SMK will destabilize at 1000yrds. This is due to speed loss and having a tangent ogive. Using another bullet of same weight with a secant ogive, can penetrate through the sonic barrier to subsonic and maintain stability. We also know that JLK, Hornady, and Berger use the Secant ogive, respectively, on their A-Max and VLD bullets. This leads me to believe that the 250grn BTHP by Hornady would be designed with the secant ogive. Without knowing the exact specs of the bullet it is difficult to say, but looking at pictures of said bullets in question, you can see a much longer taper on the Hornady over the Sierra. </p><p></p><p>The other factor is once again our dear friend velocity. The high BC for and the the design, plus the increased velocity over the 300grn SMK helped to push it through and maintain trajectory. However any bullet at this time is going to be very susceptible to any minor wind change. However from Topshot's notes we can see that all the bullets impacted in line and on the same level as his previous shots. We can also deduce that the SMK could not handle that transition. A few would go high, some would go low. Therefore we see by this demonstration that a 250grn Secant ogive pushed hard enough can transition in such a way that a 300grn SMK Tangent ogive can not.</p><p></p><p>Watson, get me my pipe!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> I feel like a stroll to Scotland Yard. Oh... it was the maid with the candle stick holder in the pool house.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /></p><p></p><p>Tank</p></blockquote><p></p>
[QUOTE="liltank, post: 356988, member: 13275"] Well this is my only theory. We all know that the 168SMK will destabilize at 1000yrds. This is due to speed loss and having a tangent ogive. Using another bullet of same weight with a secant ogive, can penetrate through the sonic barrier to subsonic and maintain stability. We also know that JLK, Hornady, and Berger use the Secant ogive, respectively, on their A-Max and VLD bullets. This leads me to believe that the 250grn BTHP by Hornady would be designed with the secant ogive. Without knowing the exact specs of the bullet it is difficult to say, but looking at pictures of said bullets in question, you can see a much longer taper on the Hornady over the Sierra. The other factor is once again our dear friend velocity. The high BC for and the the design, plus the increased velocity over the 300grn SMK helped to push it through and maintain trajectory. However any bullet at this time is going to be very susceptible to any minor wind change. However from Topshot's notes we can see that all the bullets impacted in line and on the same level as his previous shots. We can also deduce that the SMK could not handle that transition. A few would go high, some would go low. Therefore we see by this demonstration that a 250grn Secant ogive pushed hard enough can transition in such a way that a 300grn SMK Tangent ogive can not. Watson, get me my pipe!:D I feel like a stroll to Scotland Yard. Oh... it was the maid with the candle stick holder in the pool house.:cool: Tank [/QUOTE]
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Need help with 2285 yard shot.
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