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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: 282424" data-attributes="member: 10486"><p>Cartridge : 7 mm WSM</p><p>Bullet : .284, 180, Berger VLD</p><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 84 54.40 2246 2016 26219 9513 93.7 1.896</p><p>-18.0 86 55.76 2306 2126 27992 9822 95.1 1.846</p><p>-16.0 88 57.12 2367 2239 29893 10111 96.3 1.798</p><p>-14.0 90 58.48 2428 2356 31931 10377 97.4 1.750</p><p>-12.0 92 59.84 2489 2475 34119 10617 98.3 1.704</p><p>-10.0 94 61.20 2549 2597 36469 10831 99.0 1.658</p><p>-08.0 96 62.56 2610 2722 38996 11015 99.5 1.608</p><p>-06.0 98 63.92 2670 2849 41714 11170 99.8 1.557</p><p>-04.0 101 65.28 2729 2978 44642 11291 100.0 1.508</p><p>-02.0 103 66.64 2789 3108 47800 11386 100.0 1.460</p><p>+00.0 105 68.00 2847 3240 51209 11474 100.0 1.414</p><p>+02.0 107 69.36 2905 3373 54894 11559 100.0 1.370 ! Near Maximum !</p><p>+04.0 109 70.72 2962 3507 58881 11640 100.0 1.328 ! Near Maximum !</p><p>+06.0 111 72.08 3019 3643 63204 11717 100.0 1.287 ! Near Maximum !</p><p>+08.0 113 73.44 3076 3781 67898 11789 100.0 1.247 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 115 74.80 3132 3921 73003 11856 100.0 1.208 !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 105 68.00 2976 3541 63784 10974 100.0 1.297 ! Near Maximum !</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 105 68.00 2647 2800 40821 11748 97.3 1.568</p></blockquote><p></p>
[QUOTE="jmason, post: 282424, member: 10486"] Cartridge : 7 mm WSM Bullet : .284, 180, Berger VLD 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 84 54.40 2246 2016 26219 9513 93.7 1.896 -18.0 86 55.76 2306 2126 27992 9822 95.1 1.846 -16.0 88 57.12 2367 2239 29893 10111 96.3 1.798 -14.0 90 58.48 2428 2356 31931 10377 97.4 1.750 -12.0 92 59.84 2489 2475 34119 10617 98.3 1.704 -10.0 94 61.20 2549 2597 36469 10831 99.0 1.658 -08.0 96 62.56 2610 2722 38996 11015 99.5 1.608 -06.0 98 63.92 2670 2849 41714 11170 99.8 1.557 -04.0 101 65.28 2729 2978 44642 11291 100.0 1.508 -02.0 103 66.64 2789 3108 47800 11386 100.0 1.460 +00.0 105 68.00 2847 3240 51209 11474 100.0 1.414 +02.0 107 69.36 2905 3373 54894 11559 100.0 1.370 ! Near Maximum ! +04.0 109 70.72 2962 3507 58881 11640 100.0 1.328 ! Near Maximum ! +06.0 111 72.08 3019 3643 63204 11717 100.0 1.287 ! Near Maximum ! +08.0 113 73.44 3076 3781 67898 11789 100.0 1.247 !DANGEROUS LOAD-DO NOT USE! +10.0 115 74.80 3132 3921 73003 11856 100.0 1.208 !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 105 68.00 2976 3541 63784 10974 100.0 1.297 ! Near Maximum ! Data for burning rate decreased by 10% relative to nominal value: -Ba 105 68.00 2647 2800 40821 11748 97.3 1.568 [/QUOTE]
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7WSM with H4831SC & H1000 & Retumbo
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