Muzz,
Here you go.
Used my case capacity and burn rate I've seen.
Remember, it's just a good guess. :grin:
Get me capacity and some speeds and I'll tune it for you.
Code:
Cartridge : .280 Ack Imp
Bullet : .284, 168, Berger Hunt VLD #28501
Useable Case Capaci: 63.111 grain H2O = 4.098 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 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 0.807% 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
-08.1 91 56.92 2843 3015 51211 10377 100.0 1.373
-07.3 92 57.42 2866 3064 52743 10417 100.0 1.355
-06.5 93 57.92 2889 3114 54321 10457 100.0 1.338
-05.7 93 58.42 2912 3163 55946 10496 100.0 1.321 ! Near Maximum !
-04.8 94 58.92 2935 3213 57619 10534 100.0 1.304 ! Near Maximum !
-04.0 95 59.42 2958 3263 59343 10572 100.0 1.287 ! Near Maximum !
-03.2 96 59.92 2981 3314 61118 10609 100.0 1.270 ! Near Maximum !
-02.4 97 60.42 3003 3364 62948 10646 100.0 1.254 ! Near Maximum !
-01.6 97 60.92 3026 3415 64833 10682 100.0 1.238 !DANGEROUS LOAD-DO NOT USE!
-00.8 98 61.42 3048 3466 66776 10717 100.0 1.223 !DANGEROUS LOAD-DO NOT USE!
+00.0 99 61.92 3071 3518 68780 10751 100.0 1.207 !DANGEROUS LOAD-DO NOT USE!
+00.8 100 62.42 3093 3569 70845 10785 100.0 1.192 !DANGEROUS LOAD-DO NOT USE!
+01.6 101 62.92 3116 3621 72975 10818 100.0 1.177 !DANGEROUS LOAD-DO NOT USE!
+02.4 101 63.42 3138 3673 75172 10851 100.0 1.163 !DANGEROUS LOAD-DO NOT USE!
+03.2 102 63.92 3160 3726 77439 10883 100.0 1.148 !DANGEROUS LOAD-DO NOT USE!
+04.0 103 64.42 3183 3779 79779 10914 100.0 1.134 !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 99 61.92 3125 3643 77025 10535 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 99 61.92 3004 3365 60627 11014 100.0 1.266 ! Near Maximum !
