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Downrange energy
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<blockquote data-quote="Dave King" data-source="post: 57390" data-attributes="member: 3"><p>The published BC on the Swift A-Frame is .427.</p><p></p><p>Here's 2860fps at sea-level 59 degrees with the Swift A-Frame.</p><p></p><p> <font class="small">Code:</font><hr /><pre></p><p></p><p>Yards Speed Energy</p><p>0 2860 4540</p><p>50 2751 4200</p><p>100 2644 3880</p><p>150 2541 3583</p><p>200 2439 3301</p><p>250 2340 3039</p><p>300 2243 2792</p><p>350 2149 2563</p><p>400 2056 2346</p><p>450 1966 2145</p><p>500 1878 1957</p><p>550 1793 1784</p><p>600 1712 1626</p><p>650 1633 1480</p><p>700 1557 1345</p><p>750 1483 1220</p><p>800 1415 1111</p><p>850 1351 1013</p><p>900 1291 925</p><p>950 1235 846</p><p>1000 1186 780</p><p>1050 1141 722</p><p>1100 1102 674</p><p>1150 1068 633</p><p>1200 1038 598</p><p>1250 1012 568</p><p>1300 988 541</p><p>1350 966 517</p><p>1400 946 496</p><p>1450 927 476</p><p>1500 909 458</p><p>1550 893 442</p><p>1600 877 426</p><p>1650 862 412</p><p>1700 847 398</p><p>1750 833 385</p><p>1800 819 372</p><p>1850 806 360</p><p>1900 794 349</p><p>1950 781 338</p><p>2000 769 328</p><p></p><p> </pre><hr /> </p><p></p><p>The published BC on a Sierra MatchKing 300 is .768 <strong>not .587 </strong></p><p></p><p>Here's sea-level at 2900 fps 59 degrees</p><p></p><p> <font class="small">Code:</font><hr /><pre> </p><p></p><p>Yards Speed Energy</p><p>0 2900 5601</p><p>50 2838 5364</p><p>100 2777 5136</p><p>150 2718 4920</p><p>200 2659 4709</p><p>250 2601 4506</p><p>300 2543 4307</p><p>350 2486 4116</p><p>400 2430 3933</p><p>450 2375 3757</p><p>500 2320 3585</p><p>550 2267 3423</p><p>600 2213 3262</p><p>650 2161 3110</p><p>700 2109 2962</p><p>750 2058 2821</p><p>800 2008 2685</p><p>850 1958 2553</p><p>900 1909 2427</p><p>950 1860 2304</p><p>1000 1813 2189</p><p>1050 1767 2079</p><p>1100 1722 1975</p><p>1150 1678 1875</p><p>1200 1634 1778</p><p>1250 1592 1688</p><p>1300 1550 1600</p><p>1350 1509 1516</p><p>1400 1468 1435</p><p>1450 1431 1363</p><p>1500 1394 1294</p><p>1550 1359 1230</p><p>1600 1325 1169</p><p>1650 1292 1111</p><p>1700 1260 1057</p><p>1750 1229 1006</p><p>1800 1202 962</p><p>1850 1176 921</p><p>1900 1151 882</p><p>1950 1128 847</p><p>2000 1107 816</p><p></p><p> </pre><hr /></p><p></p><p></p><p>The real BC for the SMK 338 300 is closer to .800 so the earlier numbers reflect the better BC.</p></blockquote><p></p>
[QUOTE="Dave King, post: 57390, member: 3"] The published BC on the Swift A-Frame is .427. Here's 2860fps at sea-level 59 degrees with the Swift A-Frame. <font class="small">Code:</font><hr /><pre> Yards Speed Energy 0 2860 4540 50 2751 4200 100 2644 3880 150 2541 3583 200 2439 3301 250 2340 3039 300 2243 2792 350 2149 2563 400 2056 2346 450 1966 2145 500 1878 1957 550 1793 1784 600 1712 1626 650 1633 1480 700 1557 1345 750 1483 1220 800 1415 1111 850 1351 1013 900 1291 925 950 1235 846 1000 1186 780 1050 1141 722 1100 1102 674 1150 1068 633 1200 1038 598 1250 1012 568 1300 988 541 1350 966 517 1400 946 496 1450 927 476 1500 909 458 1550 893 442 1600 877 426 1650 862 412 1700 847 398 1750 833 385 1800 819 372 1850 806 360 1900 794 349 1950 781 338 2000 769 328 </pre><hr /> The published BC on a Sierra MatchKing 300 is .768 [b]not .587 [/b] Here's sea-level at 2900 fps 59 degrees <font class="small">Code:</font><hr /><pre> Yards Speed Energy 0 2900 5601 50 2838 5364 100 2777 5136 150 2718 4920 200 2659 4709 250 2601 4506 300 2543 4307 350 2486 4116 400 2430 3933 450 2375 3757 500 2320 3585 550 2267 3423 600 2213 3262 650 2161 3110 700 2109 2962 750 2058 2821 800 2008 2685 850 1958 2553 900 1909 2427 950 1860 2304 1000 1813 2189 1050 1767 2079 1100 1722 1975 1150 1678 1875 1200 1634 1778 1250 1592 1688 1300 1550 1600 1350 1509 1516 1400 1468 1435 1450 1431 1363 1500 1394 1294 1550 1359 1230 1600 1325 1169 1650 1292 1111 1700 1260 1057 1750 1229 1006 1800 1202 962 1850 1176 921 1900 1151 882 1950 1128 847 2000 1107 816 </pre><hr /> The real BC for the SMK 338 300 is closer to .800 so the earlier numbers reflect the better BC. [/QUOTE]
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