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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New .338 cal 300 grain Nosler Accubond Long Range
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<blockquote data-quote="J E Custom" data-source="post: 1566524" data-attributes="member: 2736"><p>I have heard good things about the LRAB's and can see what might be an advantage for extreme long range.</p><p></p><p>I don't claim to be an expert on bullet design and can only apply my experience with different bullet shapes and there behavior at different distanced and velocity.</p><p></p><p>From what I can tell they are what we would call a hybrid design.</p><p>secant ojive bullets have a much higher nose length to caliber Ratio than a Tangent ojive. (Tangent ojive's have a ratio of 8 to 1 and secant ojive's have a ratio of 16 to 1. This increase in nose length as well as overall length will increase the BC of the bullet, but may have a negative effect when it drops through the trans sonic velocity.</p><p></p><p>The shock wave appears to contribute some yaw to the back of the bullet. For some reason the tangent ojive has better luck managing</p><p>trans sonic velocities.</p><p></p><p>It appears that the LRAB is an attempt to find a happy medium for this problem with a higher ratio for the tangent ojive without going to a secant ojive.</p><p></p><p>I have seen high speed video of bullets at or below trans sonic velocities and the yaw was evident but inconclusive because there were many other things like twist rates that could be the problem and only full disclosure of all conditions and a direct comparison and shock wave video would show if there were any difference and when it occurred.</p><p></p><p>Maybe someone with much more knowledge about bullet shapes could explain this better than I have. The only tool I have is experience and common sense, so seeing is believing.</p><p></p><p>discussions are open and welcome.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1566524, member: 2736"] I have heard good things about the LRAB's and can see what might be an advantage for extreme long range. I don't claim to be an expert on bullet design and can only apply my experience with different bullet shapes and there behavior at different distanced and velocity. From what I can tell they are what we would call a hybrid design. secant ojive bullets have a much higher nose length to caliber Ratio than a Tangent ojive. (Tangent ojive's have a ratio of 8 to 1 and secant ojive's have a ratio of 16 to 1. This increase in nose length as well as overall length will increase the BC of the bullet, but may have a negative effect when it drops through the trans sonic velocity. The shock wave appears to contribute some yaw to the back of the bullet. For some reason the tangent ojive has better luck managing trans sonic velocities. It appears that the LRAB is an attempt to find a happy medium for this problem with a higher ratio for the tangent ojive without going to a secant ojive. I have seen high speed video of bullets at or below trans sonic velocities and the yaw was evident but inconclusive because there were many other things like twist rates that could be the problem and only full disclosure of all conditions and a direct comparison and shock wave video would show if there were any difference and when it occurred. Maybe someone with much more knowledge about bullet shapes could explain this better than I have. The only tool I have is experience and common sense, so seeing is believing. discussions are open and welcome. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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New .338 cal 300 grain Nosler Accubond Long Range
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