Cartridge : .270 Win. (SAAMI)
Bullet : .277, 130, Barnes 'TTSX'BT 30276
Useable Case Capaci: 59.268 grain H2O = 3.848 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-26 *C
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.794% 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
-07.9 99 58.00 2920 2461 46358 13371 98.0 1.176
-07.1 100 58.50 2950 2513 47816 13469 98.4 1.160
-06.3 100 59.00 2981 2564 49326 13561 98.7 1.143
-05.6 101 59.50 3011 2617 50894 13646 98.9 1.126
-04.8 102 60.00 3041 2670 52518 13725 99.2 1.109
-04.0 103 60.50 3071 2723 54204 13797 99.4 1.093
-03.2 104 61.00 3102 2777 55953 13862 99.6 1.077 ! Near Maximum !
-02.4 105 61.50 3132 2831 57771 13919 99.7 1.062 ! Near Maximum !
-01.6 106 62.00 3162 2886 59657 13970 99.8 1.046 ! Near Maximum !
-00.8 106 62.50 3192 2941 61620 14012 99.9 1.031 ! Near Maximum !
+00.0 107 63.00 3222 2997 63659 14048 100.0 1.016 ! Near Maximum !
+00.8 108 63.50 3252 3053 65779 14075 100.0 1.001 !DANGEROUS LOAD-DO NOT USE!
+01.6 109 64.00 3282 3109 67985 14097 100.0 0.986 !DANGEROUS LOAD-DO NOT USE!
+02.4 110 64.50 3311 3165 70281 14119 100.0 0.971 !DANGEROUS LOAD-DO NOT USE!
+03.2 111 65.00 3341 3222 72671 14139 100.0 0.957 !DANGEROUS LOAD-DO NOT USE!
+04.0 112 65.50 3371 3280 75162 14158 100.0 0.943 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 107 63.00 3280 3105 68634 13817 100.0 0.985 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba 107 63.00 3156 2876 59031 14202 99.5 1.048 ! Near Maximum !
