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Rifles, Reloading, Optics, Equipment
Reloading
QuickLoad ?????????????
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<blockquote data-quote="steve smith" data-source="post: 306677" data-attributes="member: 110"><p>This should be a bit more realistic, but like I said before, it is best to work up the load over a chronograph. Special attention should be given to the two variations of powder burn rate. Increasing the burn rate by 10% takes a nominal 54kpsi load to a 65+kpsi without a change it charge weight, so as usual work up the load slowly. By that I mean start low (say 96-97gr), if a chronograph is used, a step of 1gr intervals is not out of the question with a case capacity that of the RUM.</p><p></p><p></p><p>The columns read</p><p>1st % of 101.1gr</p><p>2nd % of case filled</p><p>3rd Actual charge weight in grains</p><p>4th Velocity in fps</p><p>5th Energy in lb*ft</p><p>6th Pressure maximum in psi</p><p>7th Muzzel pressure in psi</p><p>8th % of propellent burned</p><p>9th Propellent burn time in milli seconds</p><p></p><p>Cartridge : .300 Rem Ultra Mag</p><p>Bullet : .308, 210, Berger M T VLD</p><p>Useable Case Capaci: 101.203 grain H2O = 6.571 cm³</p><p>Cartridge O.A.L. L6: 3.675 inch = 93.35 mm</p><p>Barrel Length : 26.0 inch = 660.4 mm</p><p>Powder : Hodgdon US 869</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 81 80.88 2256 2372 28270 10451 79.3 1.783</p><p>-18.0 83 82.90 2316 2500 30086 10866 80.9 1.741</p><p>-16.0 85 84.92 2376 2633 32034 11281 82.4 1.701</p><p>-14.0 87 86.95 2438 2772 34134 11693 83.9 1.660</p><p>-12.0 90 88.97 2501 2916 36402 12102 85.3 1.621</p><p>-10.0 92 90.99 2564 3065 38841 12505 86.8 1.581</p><p>-08.0 94 93.01 2628 3221 41472 12900 88.1 1.543</p><p>-06.0 96 95.03 2693 3382 44313 13287 89.5 1.504</p><p>-04.0 98 97.06 2759 3548 47376 13663 90.7 1.467</p><p>-02.0 100 99.08 2825 3721 50653 14026 91.9 1.429</p><p>+00.0 102 101.10 2892 3899 54165 14375 93.1 1.393</p><p>+02.0 104 103.12 2959 4083 57956 14707 94.2 1.351 ! Near Maximum !</p><p>+04.0 106 105.14 3027 4273 62062 15020 95.2 1.308 ! Near Maximum !</p><p>+06.0 108 107.17 3096 4469 66514 15312 96.1 1.265 !DANGEROUS LOAD-DO NOT USE!</p><p>+08.0 110 109.19 3165 4671 71351 15582 96.9 1.224 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 112 111.21 3235 4879 76616 15826 97.6 1.184 !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></p><p>Data for burning rate increased by 10% relative to nominal value:</p><p>+Ba 102 101.10 3074 4406 65680 14787 98.4 1.280 !DANGEROUS LOAD-DO NOT USE!</p><p></p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 102 101.10 2667 3318 43258 13240 83.9 1.505</p></blockquote><p></p>
[QUOTE="steve smith, post: 306677, member: 110"] This should be a bit more realistic, but like I said before, it is best to work up the load over a chronograph. Special attention should be given to the two variations of powder burn rate. Increasing the burn rate by 10% takes a nominal 54kpsi load to a 65+kpsi without a change it charge weight, so as usual work up the load slowly. By that I mean start low (say 96-97gr), if a chronograph is used, a step of 1gr intervals is not out of the question with a case capacity that of the RUM. The columns read 1st % of 101.1gr 2nd % of case filled 3rd Actual charge weight in grains 4th Velocity in fps 5th Energy in lb*ft 6th Pressure maximum in psi 7th Muzzel pressure in psi 8th % of propellent burned 9th Propellent burn time in milli seconds Cartridge : .300 Rem Ultra Mag Bullet : .308, 210, Berger M T VLD Useable Case Capaci: 101.203 grain H2O = 6.571 cm³ Cartridge O.A.L. L6: 3.675 inch = 93.35 mm Barrel Length : 26.0 inch = 660.4 mm Powder : Hodgdon US 869 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 81 80.88 2256 2372 28270 10451 79.3 1.783 -18.0 83 82.90 2316 2500 30086 10866 80.9 1.741 -16.0 85 84.92 2376 2633 32034 11281 82.4 1.701 -14.0 87 86.95 2438 2772 34134 11693 83.9 1.660 -12.0 90 88.97 2501 2916 36402 12102 85.3 1.621 -10.0 92 90.99 2564 3065 38841 12505 86.8 1.581 -08.0 94 93.01 2628 3221 41472 12900 88.1 1.543 -06.0 96 95.03 2693 3382 44313 13287 89.5 1.504 -04.0 98 97.06 2759 3548 47376 13663 90.7 1.467 -02.0 100 99.08 2825 3721 50653 14026 91.9 1.429 +00.0 102 101.10 2892 3899 54165 14375 93.1 1.393 +02.0 104 103.12 2959 4083 57956 14707 94.2 1.351 ! Near Maximum ! +04.0 106 105.14 3027 4273 62062 15020 95.2 1.308 ! Near Maximum ! +06.0 108 107.17 3096 4469 66514 15312 96.1 1.265 !DANGEROUS LOAD-DO NOT USE! +08.0 110 109.19 3165 4671 71351 15582 96.9 1.224 !DANGEROUS LOAD-DO NOT USE! +10.0 112 111.21 3235 4879 76616 15826 97.6 1.184 !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 102 101.10 3074 4406 65680 14787 98.4 1.280 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 102 101.10 2667 3318 43258 13240 83.9 1.505 [/QUOTE]
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