Bruce Mc
Handloader
- Oct 26, 2005
- 1,361
- 807
Could someone run a quick load for me? 270 win, 130gr Sierra Game King, Reloder 16 powder, 22" barrel.
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Cartridge : .270 Win. (SAAMI)
Bullet : .277, 130, Sierra SPBT 1820
Useable Case Capaci: 62.542 grain H2O = 4.061 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-16 *C *T
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 90 50.76 2860 2361 46557 12282 98.8 1.167
-09.0 91 51.32 2890 2412 48058 12390 99.1 1.150
-08.0 92 51.89 2921 2463 49618 12492 99.3 1.133
-07.0 93 52.45 2951 2514 51223 12588 99.5 1.116
-06.0 94 53.02 2981 2565 52880 12678 99.7 1.100
-05.0 95 53.58 3011 2617 54593 12761 99.8 1.084
-04.0 96 54.14 3041 2669 56362 12838 99.9 1.068 ! Near Maximum !
-03.0 97 54.71 3071 2722 58189 12909 100.0 1.053 ! Near Maximum !
-02.0 98 55.27 3100 2774 60079 12972 100.0 1.038 ! Near Maximum !
-01.0 99 55.84 3129 2827 62031 13030 100.0 1.023 ! Near Maximum !
+00.0 100 56.40 3159 2880 64048 13085 100.0 1.008 ! Near Maximum !
+01.0 101 56.96 3188 2933 66136 13139 100.0 0.994 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 57.53 3217 2987 68292 13192 100.0 0.980 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 58.09 3245 3040 70518 13245 100.0 0.966 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 58.66 3274 3094 72834 13296 100.0 0.952 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 59.22 3302 3148 75224 13347 100.0 0.939 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 100 56.40 3222 2997 70440 12818 100.0 0.970 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 100 56.40 3080 2738 58024 13317 99.5 1.052 ! Near Maximum !