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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Quickload info request
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<blockquote data-quote="284saum" data-source="post: 1572829" data-attributes="member: 96333"><p>I adjusted start pressure to 5000psi (equivalent to .200" freebore) to get 2960 fps</p><p></p><p>[CODE]Cartridge : .338 Lapua Mag.</p><p>Bullet : .338, 250, Sierra HPBT MatchK 2650</p><p>Useable Case Capaci: 93.978 grain H2O = 6.102 cm³</p><p>Cartridge O.A.L. L6: 3.640 inch = 92.46 mm</p><p>Barrel Length : 26.0 inch = 660.4 mm</p><p>Powder : IMR 4350</p><p></p><p>Predicted data by increasing and decreasing the given charge,</p><p>incremented in steps of 1.0% 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>-10.0 89 76.50 2719 4103 57557 9625 100.0 1.348 ! Near Maximum !</p><p>-09.0 90 77.35 2744 4178 59289 9681 100.0 1.330 ! Near Maximum !</p><p>-08.0 91 78.20 2768 4254 61071 9735 100.0 1.312 !DANGEROUS LOAD-DO NOT USE!</p><p>-07.0 92 79.05 2793 4329 62906 9789 100.0 1.295 !DANGEROUS LOAD-DO NOT USE!</p><p>-06.0 93 79.90 2817 4405 64794 9842 100.0 1.278 !DANGEROUS LOAD-DO NOT USE!</p><p>-05.0 94 80.75 2841 4481 66738 9894 100.0 1.261 !DANGEROUS LOAD-DO NOT USE!</p><p>-04.0 95 81.60 2865 4557 68740 9946 100.0 1.244 !DANGEROUS LOAD-DO NOT USE!</p><p>-03.0 96 82.45 2889 4633 70801 9997 100.0 1.228 !DANGEROUS LOAD-DO NOT USE!</p><p>-02.0 97 83.30 2913 4710 72925 10047 100.0 1.212 !DANGEROUS LOAD-DO NOT USE!</p><p>-01.0 98 84.15 2937 4787 75112 10097 100.0 1.197 !DANGEROUS LOAD-DO NOT USE!</p><p>+00.0 99 85.00 2960 4864 77365 10146 100.0 1.182 !DANGEROUS LOAD-DO NOT USE!</p><p>+01.0 100 85.85 2984 4942 79688 10194 100.0 1.167 !DANGEROUS LOAD-DO NOT USE!</p><p>+02.0 101 86.70 3007 5020 82081 10241 100.0 1.152 !DANGEROUS LOAD-DO NOT USE!</p><p>+03.0 102 87.55 3030 5098 84549 10288 100.0 1.137 !DANGEROUS LOAD-DO NOT USE!</p><p>+04.0 103 88.40 3054 5177 87094 10334 100.0 1.123 !DANGEROUS LOAD-DO NOT USE!</p><p>+05.0 104 89.25 3077 5256 89718 10379 100.0 1.109 !DANGEROUS LOAD-DO NOT USE!</p><p></p><p>Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge</p><p>Data for burning rate increased by 10% relative to nominal value:</p><p>+Ba 99 85.00 3031 5099 89065 9848 100.0 1.117 !DANGEROUS LOAD-DO NOT USE!</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 99 85.00 2853 4518 65525 10541 99.7 1.268 !DANGEROUS LOAD-DO NOT USE![/CODE]</p></blockquote><p></p>
[QUOTE="284saum, post: 1572829, member: 96333"] I adjusted start pressure to 5000psi (equivalent to .200" freebore) to get 2960 fps [CODE]Cartridge : .338 Lapua Mag. Bullet : .338, 250, Sierra HPBT MatchK 2650 Useable Case Capaci: 93.978 grain H2O = 6.102 cm³ Cartridge O.A.L. L6: 3.640 inch = 92.46 mm Barrel Length : 26.0 inch = 660.4 mm Powder : IMR 4350 Predicted data by increasing and decreasing the given charge, incremented in steps of 1.0% 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 -10.0 89 76.50 2719 4103 57557 9625 100.0 1.348 ! Near Maximum ! -09.0 90 77.35 2744 4178 59289 9681 100.0 1.330 ! Near Maximum ! -08.0 91 78.20 2768 4254 61071 9735 100.0 1.312 !DANGEROUS LOAD-DO NOT USE! -07.0 92 79.05 2793 4329 62906 9789 100.0 1.295 !DANGEROUS LOAD-DO NOT USE! -06.0 93 79.90 2817 4405 64794 9842 100.0 1.278 !DANGEROUS LOAD-DO NOT USE! -05.0 94 80.75 2841 4481 66738 9894 100.0 1.261 !DANGEROUS LOAD-DO NOT USE! -04.0 95 81.60 2865 4557 68740 9946 100.0 1.244 !DANGEROUS LOAD-DO NOT USE! -03.0 96 82.45 2889 4633 70801 9997 100.0 1.228 !DANGEROUS LOAD-DO NOT USE! -02.0 97 83.30 2913 4710 72925 10047 100.0 1.212 !DANGEROUS LOAD-DO NOT USE! -01.0 98 84.15 2937 4787 75112 10097 100.0 1.197 !DANGEROUS LOAD-DO NOT USE! +00.0 99 85.00 2960 4864 77365 10146 100.0 1.182 !DANGEROUS LOAD-DO NOT USE! +01.0 100 85.85 2984 4942 79688 10194 100.0 1.167 !DANGEROUS LOAD-DO NOT USE! +02.0 101 86.70 3007 5020 82081 10241 100.0 1.152 !DANGEROUS LOAD-DO NOT USE! +03.0 102 87.55 3030 5098 84549 10288 100.0 1.137 !DANGEROUS LOAD-DO NOT USE! +04.0 103 88.40 3054 5177 87094 10334 100.0 1.123 !DANGEROUS LOAD-DO NOT USE! +05.0 104 89.25 3077 5256 89718 10379 100.0 1.109 !DANGEROUS LOAD-DO NOT USE! Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge Data for burning rate increased by 10% relative to nominal value: +Ba 99 85.00 3031 5099 89065 9848 100.0 1.117 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 99 85.00 2853 4518 65525 10541 99.7 1.268 !DANGEROUS LOAD-DO NOT USE![/CODE] [/QUOTE]
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