Cartridge : .270 Win. (SAAMI)
Bullet : .277, 145, Hornady ELD-X 27356
Useable Case Capaci: 58.678 grain H2O = 3.810 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Winchester 6,5 StaBall *T*C
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 88 50.94 2601 2179 45360 10277 99.9 1.251
-09.0 88 51.51 2628 2224 46876 10347 100.0 1.233
-08.0 89 52.07 2655 2270 48447 10411 100.0 1.214
-07.0 90 52.64 2682 2315 50072 10471 100.0 1.196
-06.0 91 53.20 2708 2361 51754 10528 100.0 1.178
-05.0 92 53.77 2735 2408 53496 10585 100.0 1.161
-04.0 93 54.34 2761 2454 55301 10641 100.0 1.143 ! Near Maximum !
-03.0 94 54.90 2787 2501 57169 10696 100.0 1.126 ! Near Maximum !
-02.0 95 55.47 2813 2548 59110 10750 100.0 1.110 ! Near Maximum !
-01.0 96 56.03 2839 2595 61118 10804 100.0 1.094 ! Near Maximum !
+00.0 97 56.60 2865 2642 63202 10856 100.0 1.078 ! Near Maximum !
+01.0 98 57.17 2891 2690 65362 10908 100.0 1.062 !DANGEROUS LOAD-DO NOT USE!
+02.0 99 57.73 2916 2738 67603 10959 100.0 1.047 !DANGEROUS LOAD-DO NOT USE!
+03.0 100 58.30 2942 2787 69928 11008 100.0 1.032 !DANGEROUS LOAD-DO NOT USE!
+04.0 101 58.86 2968 2835 72333 11057 100.0 1.017 !DANGEROUS LOAD-DO NOT USE!
+05.0 102 59.43 2993 2884 74822 11105 100.0 1.002 !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 97 56.60 2954 2809 75336 10528 100.0 1.007 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 56.60 2730 2400 51755 11232 99.4 1.172Cartridge : .270 Win. (SAAMI)
Bullet : .277, 145, Hornady ELD-X 27356
Useable Case Capaci: 58.678 grain H2O = 3.810 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : IMR 4831
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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
-10.0 93 48.42 2642 2247 46091 11084 99.0 1.265
-09.0 95 48.96 2670 2295 47604 11178 99.2 1.246
-08.0 96 49.50 2698 2343 49164 11267 99.4 1.227
-07.0 97 50.03 2725 2391 50774 11352 99.6 1.209
-06.0 98 50.57 2753 2440 52436 11431 99.7 1.191
-05.0 99 51.11 2781 2489 54152 11505 99.8 1.173
-04.0 100 51.65 2808 2539 55922 11573 99.9 1.156 ! Near Maximum !
-03.0 101 52.19 2836 2589 57750 11637 100.0 1.139 ! Near Maximum !
-02.0 102 52.72 2863 2639 59638 11694 100.0 1.122 ! Near Maximum !
-01.0 103 53.26 2890 2689 61587 11747 100.0 1.105 ! Near Maximum !
+00.0 104 53.80 2917 2739 63601 11799 100.0 1.089 ! Near Maximum !
+01.0 105 54.34 2944 2790 65682 11849 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 54.88 2970 2841 67832 11898 100.0 1.058 !DANGEROUS LOAD-DO NOT USE!
+03.0 107 55.41 2997 2892 70054 11947 100.0 1.043 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 55.95 3024 2944 72352 11995 100.0 1.028 !DANGEROUS LOAD-DO NOT USE!
+05.0 109 56.49 3050 2995 74728 12042 100.0 1.013 !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 53.80 3021 2939 75914 11358 100.0 1.011 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 53.80 2760 2452 51429 12050 97.8 1.195
