load data for swift scirocoII
- Thread starter muzz
- Start date
- Thread starter
- #3
DrMike
Ballistician
- Nov 8, 2006
- 37,542
- 6,615
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 150, Swift Scirocco
Useable Case Capaci: 64.807 grain H2O = 4.208 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4350
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 78 46.40 2435 1976 34553 8977 93.0 1.490
-18.0 80 47.56 2492 2068 36727 9235 94.0 1.453
-16.0 82 48.72 2548 2162 39032 9484 94.9 1.418
-14.0 84 49.88 2604 2258 41473 9722 95.8 1.379
-12.0 86 51.04 2660 2356 44061 9950 96.6 1.340
-10.0 88 52.20 2715 2456 46803 10167 97.3 1.302
-08.0 90 53.36 2771 2557 49710 10371 97.9 1.266
-06.0 92 54.52 2826 2660 52792 10562 98.4 1.231
-04.0 94 55.68 2881 2764 56061 10739 98.9 1.197 ! Near Maximum !
-02.0 96 56.84 2935 2869 59530 10901 99.3 1.165 ! Near Maximum !
+00.0 98 58.00 2989 2976 63213 11048 99.6 1.134 ! Near Maximum !
+02.0 100 59.16 3043 3085 67126 11178 99.8 1.104 !DANGEROUS LOAD-DO NOT USE!
+04.0 102 60.32 3097 3194 71286 11292 99.9 1.075 !DANGEROUS LOAD-DO NOT USE!
+06.0 103 61.48 3150 3304 75712 11388 100.0 1.046 !DANGEROUS LOAD-DO NOT USE!
+08.0 105 62.64 3202 3416 80425 11472 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
+10.0 107 63.80 3255 3528 85449 11552 100.0 0.993 !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 98 58.00 3097 3196 73734 10694 100.0 1.061 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 58.00 2836 2679 52804 10968 95.7 1.229
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 150, Swift Scirocco
Useable Case Capaci: 64.807 grain H2O = 4.208 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Norma MRP
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 51.68 2478 2046 31512 10374 91.5 1.528
-18.0 85 52.97 2544 2156 33759 10711 92.9 1.488
-16.0 87 54.26 2611 2270 36179 11033 94.2 1.449
-14.0 89 55.56 2677 2387 38783 11338 95.3 1.411
-12.0 91 56.85 2744 2508 41593 11624 96.4 1.366
-10.0 93 58.14 2811 2631 44618 11888 97.3 1.322
-08.0 95 59.43 2877 2758 47902 12130 98.1 1.279
-06.0 97 60.72 2944 2887 51442 12347 98.7 1.237
-04.0 99 62.02 3010 3018 55283 12538 99.2 1.197 ! Near Maximum !
-02.0 102 63.31 3076 3152 59444 12702 99.6 1.158 ! Near Maximum !
+00.0 104 64.60 3142 3289 63961 12836 99.9 1.121 ! Near Maximum !
+02.0 106 65.89 3208 3427 68838 12939 100.0 1.085 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 67.18 3273 3567 74106 13017 100.0 1.051 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 68.48 3337 3709 79822 13089 100.0 1.017 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 69.77 3401 3853 86032 13155 100.0 0.985 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 71.06 3465 3999 92795 13215 100.0 0.954 !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 64.60 3283 3591 78825 12298 100.0 1.031 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 64.60 2934 2868 50479 12797 95.6 1.240- Thread starter
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