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Rifles, Reloading, Optics, Equipment
Reloading
280 ai speed
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<blockquote data-quote="Ridgerunner665" data-source="post: 979878" data-attributes="member: 12660"><p>[code]Cartridge : .280 Ack Imp</p><p>Bullet : .284, 140, Barnes 'TTSX'BT 28474</p><p>Useable Case Capaci: 65.489 grain H2O = 4.252 cm³</p><p>Cartridge O.A.L. L6: 3.340 inch = 84.84 mm</p><p>Barrel Length : 24.0 inch = 609.6 mm</p><p>Powder : Norma MRP</p><p></p><p>Predicted data by increasing and decreasing the given charge,</p><p>incremented in steps of 0.758% of nominal charge.</p><p>CAUTION: Figures exceed maximum and minimum recommended loads !</p><p></p><p>Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time</p><p> % % Grains fps ft.lbs psi psi % ms</p><p></p><p>-07.6 97 61.00 2979 2759 48753 12234 97.6 1.233</p><p>-06.8 98 61.50 3006 2808 50086 12323 97.9 1.218</p><p>-06.1 98 62.00 3032 2858 51458 12409 98.1 1.203</p><p>-05.3 99 62.50 3058 2907 52872 12491 98.4 1.188</p><p>-04.5 100 63.00 3085 2958 54335 12569 98.6 1.173</p><p>-03.8 101 63.50 3111 3008 55841 12643 98.9 1.158 ! Near Maximum !</p><p>-03.0 102 64.00 3137 3059 57395 12714 99.1 1.144 ! Near Maximum !</p><p>-02.3 102 64.50 3163 3111 58999 12780 99.2 1.130 ! Near Maximum !</p><p>-01.5 103 65.00 3190 3163 60653 12842 99.4 1.116 ! Near Maximum !</p><p>-00.8 104 65.50 3216 3215 62363 12900 99.6 1.102 ! Near Maximum !</p><p>+00.0 105 66.00 3242 3267 64126 12953 99.7 1.088 ! Near Maximum !</p><p></p><p></p><p>Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge</p><p>Data for burning rate increased by 5% relative to nominal value:</p><p>+Ba 105 66.00 3326 3439 71600 12695 100.0 1.041 !DANGEROUS LOAD-DO NOT USE!</p><p>Data for burning rate decreased by 5% relative to nominal value:</p><p>-Ba 105 66.00 3140 3065 57134 12999 98.0 1.142 ! Near Maximum ! [/code]</p></blockquote><p></p>
[QUOTE="Ridgerunner665, post: 979878, member: 12660"] [code]Cartridge : .280 Ack Imp Bullet : .284, 140, Barnes 'TTSX'BT 28474 Useable Case Capaci: 65.489 grain H2O = 4.252 cm³ Cartridge O.A.L. L6: 3.340 inch = 84.84 mm Barrel Length : 24.0 inch = 609.6 mm Powder : Norma MRP Predicted data by increasing and decreasing the given charge, incremented in steps of 0.758% of nominal charge. CAUTION: Figures exceed maximum and minimum recommended loads ! Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms -07.6 97 61.00 2979 2759 48753 12234 97.6 1.233 -06.8 98 61.50 3006 2808 50086 12323 97.9 1.218 -06.1 98 62.00 3032 2858 51458 12409 98.1 1.203 -05.3 99 62.50 3058 2907 52872 12491 98.4 1.188 -04.5 100 63.00 3085 2958 54335 12569 98.6 1.173 -03.8 101 63.50 3111 3008 55841 12643 98.9 1.158 ! Near Maximum ! -03.0 102 64.00 3137 3059 57395 12714 99.1 1.144 ! Near Maximum ! -02.3 102 64.50 3163 3111 58999 12780 99.2 1.130 ! Near Maximum ! -01.5 103 65.00 3190 3163 60653 12842 99.4 1.116 ! Near Maximum ! -00.8 104 65.50 3216 3215 62363 12900 99.6 1.102 ! Near Maximum ! +00.0 105 66.00 3242 3267 64126 12953 99.7 1.088 ! Near Maximum ! Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge Data for burning rate increased by 5% relative to nominal value: +Ba 105 66.00 3326 3439 71600 12695 100.0 1.041 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 5% relative to nominal value: -Ba 105 66.00 3140 3065 57134 12999 98.0 1.142 ! Near Maximum ! [/code] [/QUOTE]
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