Cartridge : .375 Ruger
Bullet : .375, 250, Sierra SPBT 2950
Useable Case Capaci: 88.267 grain H2O = 5.731 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Winchester 6,5 StaBall *T*C
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 95 82.80 2478 3409 42785 8857 97.6 1.257
-09.0 96 83.72 2507 3488 44312 8944 97.9 1.236
-08.0 97 84.64 2535 3567 45898 9026 98.3 1.217
-07.0 98 85.56 2563 3647 47544 9104 98.6 1.197
-06.0 99 86.48 2592 3728 49266 9178 98.9 1.178
-05.0 100 87.40 2620 3810 51053 9246 99.1 1.160
-04.0 101 88.32 2648 3893 52912 9309 99.4 1.141 ! Near Maximum !
-03.0 102 89.24 2676 3976 54850 9367 99.6 1.123 ! Near Maximum !
-02.0 103 90.16 2705 4060 56867 9420 99.7 1.106 ! Near Maximum !
-01.0 104 91.08 2733 4145 58973 9467 99.8 1.088 ! Near Maximum !
+00.0 105 92.00 2761 4231 61169 9509 99.9 1.071 ! Near Maximum !
+01.0 106 92.92 2789 4317 63458 9545 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 93.84 2816 4404 65848 9575 100.0 1.037 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 94.76 2844 4491 68349 9601 100.0 1.021 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 95.68 2872 4579 70960 9626 100.0 1.005 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 96.60 2900 4668 73693 9650 100.0 0.989 !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 105 92.00 2822 4420 67133 9310 100.0 1.031 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 105 92.00 2686 4005 55531 9595 98.8 1.117 ! Near Maximum !
