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Long Range Hunting & Shooting
fastest 338 without the Cheytac
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<blockquote data-quote="Autorotate" data-source="post: 425172" data-attributes="member: 8073"><p>I'd be very impressed to see a cold bore hit on a 1 MOA size target at 1760 yards with the 13 lb rifle. That's some good shooting for sure in my book.</p><p></p><p></p><p></p><p>One way, but certainly not the only way to meet the requirements of:</p><p></p><p>10.5lb rifle/13lb finish/1500 ft/lbs of energy at 1760 yards given an atmosphere of 60 deg/4000'/50% humidity.</p><p></p><p>Bullet 1-<a href="http://www.rmbullets.com/page6.html" target="_blank"><u>RM 275 grains</u></a> @ 2975 fps fits your energy requirements. Delivers 39 ft/lbs of recoil with a 100 grain charge.</p><p></p><p>Bullet 2-Berger 300 grain @ 2985 fps delivers the energy your after, but pushes back with 44 ft/lbs of recoil with the same 100 grain charge.</p><p></p><p>Bullet 3-Sierra 300 grain @ 3165 fps delivers the required energy, but this velocity level bumps the recoil up to 47 ft/lbs.</p><p></p><p>All those numbers where using the JBM online calculator/data.</p><p></p><p>In summary, given a 28" barrel, your looking at pushing the limits of performance of the largest 338 cases, shooting the highest BC of bullets. The high BC of the 275 gr RM bullet above, looks like it might have the best potential of doing what you want it to do.</p><p></p><p>The 338 LMAI in the pic below is 14.5 lbs. If you used a MK4, you could save a 1/2 pound...it pushes a 300 SMK at 2920-2930 fps with a 28" Brux Medium Palma using 102-103 gr of Retumbo. That case ought to be able to come close to pushing a 275 grain bullet to 2950-2975 fps as per the energy/recoil analysis above.</p><p></p><p><img src="http://autorotate.smugmug.com/Other/Hunting/DSCF0787/930960763_HcD5G-X2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Autorotate, post: 425172, member: 8073"] I'd be very impressed to see a cold bore hit on a 1 MOA size target at 1760 yards with the 13 lb rifle. That's some good shooting for sure in my book. One way, but certainly not the only way to meet the requirements of: 10.5lb rifle/13lb finish/1500 ft/lbs of energy at 1760 yards given an atmosphere of 60 deg/4000'/50% humidity. Bullet 1-[URL="http://www.rmbullets.com/page6.html"][U]RM 275 grains[/U][/URL] @ 2975 fps fits your energy requirements. Delivers 39 ft/lbs of recoil with a 100 grain charge. Bullet 2-Berger 300 grain @ 2985 fps delivers the energy your after, but pushes back with 44 ft/lbs of recoil with the same 100 grain charge. Bullet 3-Sierra 300 grain @ 3165 fps delivers the required energy, but this velocity level bumps the recoil up to 47 ft/lbs. All those numbers where using the JBM online calculator/data. In summary, given a 28" barrel, your looking at pushing the limits of performance of the largest 338 cases, shooting the highest BC of bullets. The high BC of the 275 gr RM bullet above, looks like it might have the best potential of doing what you want it to do. The 338 LMAI in the pic below is 14.5 lbs. If you used a MK4, you could save a 1/2 pound...it pushes a 300 SMK at 2920-2930 fps with a 28" Brux Medium Palma using 102-103 gr of Retumbo. That case ought to be able to come close to pushing a 275 grain bullet to 2950-2975 fps as per the energy/recoil analysis above. [IMG]http://autorotate.smugmug.com/Other/Hunting/DSCF0787/930960763_HcD5G-X2.jpg[/IMG] [/QUOTE]
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fastest 338 without the Cheytac
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