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Long Range Hunting & Shooting
Ballistic Coefficient (BC) - How important is it?
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<blockquote data-quote="HARPERC" data-source="post: 1818876" data-attributes="member: 30671"><p>I think 200 fps doesn't represent well what some of us are looking at. Some of the bigger case driving bullets several hundred fps are beginning to be realistic. Using the generic Nosler data in .338 RUM, The 180 Accubond at 3535 fps (BC 0.372) vs the 300 grain version at 2643 fps for example (BC 0.72) Using generally 1800 fps as a threshold for good expansion gets both to 700 yards, before the 300 starts its run to the 100 yard line. The 300 is at 1554 fps while the 180 is at 1314. Drop favors the 180 all along the way-256" against 319" at a 1000. Drift goes to the 300 in a 10 mph wind 61" to 99" at a 1000. </p><p></p><p>With no surprise in that caliber the 250 grain makes a good case for itself. </p><p></p><p>I won't argue wind calls aren't important, but terminal performance is paramount. One can always pass secondary to conditions, I passed up a 300 yard shot on a goat due to conditions. Once it's turned loose the bullet has to perform.</p><p></p><p>BC important YES! However, there can be more than one way to skin a cat, all of them easier when the cat is dead.</p></blockquote><p></p>
[QUOTE="HARPERC, post: 1818876, member: 30671"] I think 200 fps doesn't represent well what some of us are looking at. Some of the bigger case driving bullets several hundred fps are beginning to be realistic. Using the generic Nosler data in .338 RUM, The 180 Accubond at 3535 fps (BC 0.372) vs the 300 grain version at 2643 fps for example (BC 0.72) Using generally 1800 fps as a threshold for good expansion gets both to 700 yards, before the 300 starts its run to the 100 yard line. The 300 is at 1554 fps while the 180 is at 1314. Drop favors the 180 all along the way-256" against 319" at a 1000. Drift goes to the 300 in a 10 mph wind 61" to 99" at a 1000. With no surprise in that caliber the 250 grain makes a good case for itself. I won't argue wind calls aren't important, but terminal performance is paramount. One can always pass secondary to conditions, I passed up a 300 yard shot on a goat due to conditions. Once it's turned loose the bullet has to perform. BC important YES! However, there can be more than one way to skin a cat, all of them easier when the cat is dead. [/QUOTE]
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Ballistic Coefficient (BC) - How important is it?
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