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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tuff time making a final decision
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<blockquote data-quote="3006savage" data-source="post: 241579" data-attributes="member: 12069"><p>Montana I do not want to come across as agrumentative but I would ask you to consider the following:</p><p> </p><p>The 168 grain 280AI round at 3050 FPS is generating 3474 FTLBS/KE at muzzle.</p><p> </p><p>The 130 grain 6.5AI at 3150 FPS is generating 2864 FTLBS/KE at the muzzle.</p><p> </p><p>The two case capacities are identical. The comparison you ran assumed the 284 bullet from the same case generated 610 FTLBS/KE more than the 264 bullet. The small bore diameter difference of .02 should only contribute approx 150 FTLBS/KE more for the 280 AI. </p><p> </p><p>I used a relatively conservative velocity estimate for the 130 grain bullet and the 3050 for the AI is MAX. That contributed to the different results but if you run numbers between the two and just allow an additional 150-200 LBS/KE for the 280 AI at the muzzle regardless of bullet weight you will be very close to the real world performance for the two. This yields a velocity difference of around 300fps between the two.</p></blockquote><p></p>
[QUOTE="3006savage, post: 241579, member: 12069"] Montana I do not want to come across as agrumentative but I would ask you to consider the following: The 168 grain 280AI round at 3050 FPS is generating 3474 FTLBS/KE at muzzle. The 130 grain 6.5AI at 3150 FPS is generating 2864 FTLBS/KE at the muzzle. The two case capacities are identical. The comparison you ran assumed the 284 bullet from the same case generated 610 FTLBS/KE more than the 264 bullet. The small bore diameter difference of .02 should only contribute approx 150 FTLBS/KE more for the 280 AI. I used a relatively conservative velocity estimate for the 130 grain bullet and the 3050 for the AI is MAX. That contributed to the different results but if you run numbers between the two and just allow an additional 150-200 LBS/KE for the 280 AI at the muzzle regardless of bullet weight you will be very close to the real world performance for the two. This yields a velocity difference of around 300fps between the two. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tuff time making a final decision
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