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Cartridge : .280 Ack Imp
Bullet : .284, 140, Nosler AccuBond 59992
Useable Case Capaci: 66.211 grain H2O = 4.299 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 27.0 inch = 685.8 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 83 54.53 2645 2175 29841 9653 94.7 1.622
-18.0 85 55.90 2718 2297 32088 9932 96.0 1.577
-16.0 87 57.26 2791 2422 34522 10186 97.1 1.532
-14.0 89 58.62 2865 2551 37163 10415 98.1 1.488
-12.0 91 59.98 2938 2683 40031 10615 98.8 1.437
-10.0 93 61.35 3010 2817 43138 10784 99.4 1.387
-08.0 96 62.71 3083 2954 46544 10921 99.8 1.339
-06.0 98 64.07 3154 3093 50245 11023 100.0 1.294
-04.0 100 65.44 3225 3233 54286 11095 100.0 1.250
-02.0 102 66.80 3295 3375 58707 11159 100.0 1.207 ! Near Maximum !
+00.0 104 68.16 3364 3518 63551 11218 100.0 1.166 ! Near Maximum !
+02.0 106 69.53 3433 3664 68870 11272 100.0 1.127 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 70.89 3501 3811 74717 11321 100.0 1.089 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 72.25 3569 3960 81108 11365 100.0 1.052 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 73.62 3637 4112 88119 11403 100.0 1.017 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 74.98 3704 4266 95830 11435 100.0 0.983 !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 104 68.16 3442 3683 72026 10943 100.0 1.113 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 104 68.16 3266 3316 55872 11547 99.9 1.228 ! Near Maximum !