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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
QuickLOAD way off from reality. Solutions?
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<blockquote data-quote="jimbires" data-source="post: 2441939" data-attributes="member: 11011"><p>I used your specs for the 7 rem mag . I did the weighting factor change that I recommended in my previous post #5 . it looks like things are lining up pretty darned close .the outside temp ,I have set at 70*F . you said actual velocity is 2953 FPS , I estimate velocity at 2959 FPS </p><p></p><p></p><p>Cartridge : 7 mm Rem. Mag.(SAAMI)</p><p>Bullet : .284, 175, Hornady ELD-X 2841 G7</p><p>Useable Case Capaci: 74.647 grain H2O = 4.847 cm³</p><p>Cartridge O.A.L. L6: 3.340 inch = 84.84 mm</p><p>Barrel Length : 26.0 inch = 660.4 mm</p><p>Powder : Alliant Reloder-26 *C</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 72 53.04 2375 2191 27400 10521 96.8 1.824</p><p>-18.0 73 54.37 2435 2303 29251 10807 97.7 1.778</p><p>-16.0 75 55.69 2495 2418 31233 11072 98.5 1.734</p><p>-14.0 77 57.02 2554 2535 33357 11315 99.1 1.690</p><p>-12.0 79 58.34 2614 2655 35634 11533 99.5 1.648</p><p>-10.0 81 59.67 2673 2776 38076 11725 99.8 1.603</p><p>-08.0 82 61.00 2731 2899 40697 11890 100.0 1.553</p><p>-06.0 84 62.32 2789 3023 43489 12030 100.0 1.506</p><p>-04.0 86 63.65 2847 3149 46445 12164 100.0 1.460</p><p>-02.0 88 64.97 2903 3275 49587 12295 100.0 1.416</p><p>+00.0 90 66.30 2959 3403 52935 12423 100.0 1.374 ! Near Maximum !</p><p>+02.0 91 67.63 3015 3533 56502 12547 100.0 1.334 ! Near Maximum !</p><p>+04.0 93 68.95 3070 3663 60306 12668 100.0 1.295 !DANGEROUS LOAD-DO NOT USE!</p><p>+06.0 95 70.28 3125 3795 64365 12786 100.0 1.257 !DANGEROUS LOAD-DO NOT USE!</p><p>+08.0 97 71.60 3180 3929 68699 12899 100.0 1.221 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 99 72.93 3234 4065 73330 13009 100.0 1.186 !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 90 66.30 3079 3684 65630 11952 100.0 1.260 !DANGEROUS LOAD-DO NOT USE!</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 90 66.30 2774 2990 40879 12902 98.8 1.530</p></blockquote><p></p>
[QUOTE="jimbires, post: 2441939, member: 11011"] I used your specs for the 7 rem mag . I did the weighting factor change that I recommended in my previous post #5 . it looks like things are lining up pretty darned close .the outside temp ,I have set at 70*F . you said actual velocity is 2953 FPS , I estimate velocity at 2959 FPS Cartridge : 7 mm Rem. Mag.(SAAMI) Bullet : .284, 175, Hornady ELD-X 2841 G7 Useable Case Capaci: 74.647 grain H2O = 4.847 cm³ Cartridge O.A.L. L6: 3.340 inch = 84.84 mm Barrel Length : 26.0 inch = 660.4 mm Powder : Alliant Reloder-26 *C 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 72 53.04 2375 2191 27400 10521 96.8 1.824 -18.0 73 54.37 2435 2303 29251 10807 97.7 1.778 -16.0 75 55.69 2495 2418 31233 11072 98.5 1.734 -14.0 77 57.02 2554 2535 33357 11315 99.1 1.690 -12.0 79 58.34 2614 2655 35634 11533 99.5 1.648 -10.0 81 59.67 2673 2776 38076 11725 99.8 1.603 -08.0 82 61.00 2731 2899 40697 11890 100.0 1.553 -06.0 84 62.32 2789 3023 43489 12030 100.0 1.506 -04.0 86 63.65 2847 3149 46445 12164 100.0 1.460 -02.0 88 64.97 2903 3275 49587 12295 100.0 1.416 +00.0 90 66.30 2959 3403 52935 12423 100.0 1.374 ! Near Maximum ! +02.0 91 67.63 3015 3533 56502 12547 100.0 1.334 ! Near Maximum ! +04.0 93 68.95 3070 3663 60306 12668 100.0 1.295 !DANGEROUS LOAD-DO NOT USE! +06.0 95 70.28 3125 3795 64365 12786 100.0 1.257 !DANGEROUS LOAD-DO NOT USE! +08.0 97 71.60 3180 3929 68699 12899 100.0 1.221 !DANGEROUS LOAD-DO NOT USE! +10.0 99 72.93 3234 4065 73330 13009 100.0 1.186 !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 90 66.30 3079 3684 65630 11952 100.0 1.260 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 90 66.30 2774 2990 40879 12902 98.8 1.530 [/QUOTE]
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QuickLOAD way off from reality. Solutions?
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