270 Weatherby Quickload Request, please?
- Thread starter wbyfan1
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 36,924
- 5,115
Code:
Cartridge : .270 Weath. Mag.
Bullet : .277, 150, Hornady SST InterLock 27402
Useable Case Capaci: 72.563 grain H2O = 4.711 cm³
Cartridge O.A.L. L6: 3.280 inch = 83.31 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26
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 76 54.64 2560 2183 30772 10843 97.7 1.690
-18.0 78 56.01 2626 2296 33015 11104 98.5 1.645
-16.0 80 57.37 2691 2412 35433 11338 99.1 1.602
-14.0 82 58.74 2756 2529 38041 11543 99.6 1.557
-12.0 84 60.10 2820 2649 40856 11716 99.9 1.506
-10.0 85 61.47 2883 2769 43895 11857 100.0 1.457
-08.0 87 62.84 2946 2891 47138 11976 100.0 1.410
-06.0 89 64.20 3008 3014 50595 12092 100.0 1.365
-04.0 91 65.57 3069 3138 54299 12204 100.0 1.322 ! Near Maximum !
-02.0 93 66.93 3130 3263 58267 12312 100.0 1.280 ! Near Maximum !
+00.0 95 68.30 3190 3389 62524 12416 100.0 1.241 ! Near Maximum !
+02.0 97 69.67 3249 3516 67091 12516 100.0 1.202 !DANGEROUS LOAD-DO NOT USE!
+04.0 99 71.03 3308 3645 71998 12612 100.0 1.166 !DANGEROUS LOAD-DO NOT USE!
+06.0 101 72.40 3367 3776 77273 12703 100.0 1.130 !DANGEROUS LOAD-DO NOT USE!
+08.0 103 73.76 3425 3908 82953 12789 100.0 1.096 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 75.13 3483 4041 89076 12871 100.0 1.064 !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 95 68.30 3308 3645 77380 11961 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 68.30 3006 3010 48161 13020 99.6 1.379- Thread starter
- #3
