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Rifles, Reloading, Optics, Equipment
Reloading
7WSM with H4831SC & H1000 & Retumbo
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<blockquote data-quote="jmason" data-source="post: 282442" data-attributes="member: 10486"><p>Cartridge O.A.L. L6: 2.860 inch or 72.64 mm</p><p>Barrel Length : 26.0 inch or 660.4 mm</p><p>Powder : Hodgdon Retumbo</p><p></p><p>Predicted data by increasing and decreasing the given charge,</p><p>incremented in steps of 2.0% 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>-20.0 83 55.20 2267 1918 24963 9374 91.2 1.876</p><p>-18.0 85 56.58 2329 2024 26632 9712 92.8 1.827</p><p>-16.0 88 57.96 2392 2134 28420 10033 94.2 1.780</p><p>-14.0 90 59.34 2454 2247 30337 10335 95.5 1.734</p><p>-12.0 92 60.72 2517 2364 32395 10614 96.7 1.688</p><p>-10.0 94 62.10 2581 2484 34602 10868 97.7 1.644</p><p>-08.0 96 63.48 2644 2607 36975 11096 98.5 1.600</p><p>-06.0 98 64.86 2707 2732 39526 11295 99.2 1.551</p><p>-04.0 100 66.24 2769 2860 42274 11463 99.6 1.501</p><p>-02.0 102 67.62 2831 2990 45233 11598 99.9 1.454</p><p>+00.0 104 69.00 2893 3122 48425 11700 100.0 1.408</p><p>+02.0 106 70.38 2954 3255 51874 11782 100.0 1.364</p><p>+04.0 108 71.76 3015 3390 55602 11859 100.0 1.321 ! Near Maximum !</p><p>+06.0 110 73.14 3075 3526 59642 11933 100.0 1.280 ! Near Maximum !</p><p>+08.0 113 74.52 3134 3664 64025 12002 100.0 1.240 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 115 75.90 3193 3804 68787 12067 100.0 1.202 !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 104 69.00 3039 3444 60112 11164 100.0 1.288 ! Near Maximum !</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 104 69.00 2673 2666 38724 11693 95.5 1.563</p></blockquote><p></p>
[QUOTE="jmason, post: 282442, member: 10486"] Cartridge O.A.L. L6: 2.860 inch or 72.64 mm Barrel Length : 26.0 inch or 660.4 mm Powder : Hodgdon Retumbo Predicted data by increasing and decreasing the given charge, incremented in steps of 2.0% 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 -20.0 83 55.20 2267 1918 24963 9374 91.2 1.876 -18.0 85 56.58 2329 2024 26632 9712 92.8 1.827 -16.0 88 57.96 2392 2134 28420 10033 94.2 1.780 -14.0 90 59.34 2454 2247 30337 10335 95.5 1.734 -12.0 92 60.72 2517 2364 32395 10614 96.7 1.688 -10.0 94 62.10 2581 2484 34602 10868 97.7 1.644 -08.0 96 63.48 2644 2607 36975 11096 98.5 1.600 -06.0 98 64.86 2707 2732 39526 11295 99.2 1.551 -04.0 100 66.24 2769 2860 42274 11463 99.6 1.501 -02.0 102 67.62 2831 2990 45233 11598 99.9 1.454 +00.0 104 69.00 2893 3122 48425 11700 100.0 1.408 +02.0 106 70.38 2954 3255 51874 11782 100.0 1.364 +04.0 108 71.76 3015 3390 55602 11859 100.0 1.321 ! Near Maximum ! +06.0 110 73.14 3075 3526 59642 11933 100.0 1.280 ! Near Maximum ! +08.0 113 74.52 3134 3664 64025 12002 100.0 1.240 !DANGEROUS LOAD-DO NOT USE! +10.0 115 75.90 3193 3804 68787 12067 100.0 1.202 !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 104 69.00 3039 3444 60112 11164 100.0 1.288 ! Near Maximum ! Data for burning rate decreased by 10% relative to nominal value: -Ba 104 69.00 2673 2666 38724 11693 95.5 1.563 [/QUOTE]
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7WSM with H4831SC & H1000 & Retumbo
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