Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 170, Lapua Naturalis LR N558 7105
Useable Case Capaci: 82.794 grain H2O = 5.376 cm³
Cartridge O.A.L. L6: 3.440 inch = 87.38 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Vihtavuori N560
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 74 57.60 2319 2030 25618 8913 82.2 1.665
-18.0 76 59.04 2376 2131 27135 9249 83.6 1.627
-16.0 78 60.48 2434 2236 28751 9583 85.1 1.590
-14.0 79 61.92 2492 2344 30467 9912 86.4 1.554
-12.0 81 63.36 2550 2455 32290 10237 87.8 1.518
-10.0 83 64.80 2609 2570 34229 10556 89.1 1.483
-08.0 85 66.24 2669 2688 36292 10867 90.3 1.449
-06.0 87 67.68 2728 2810 38488 11170 91.4 1.415
-04.0 89 69.12 2788 2934 40828 11464 92.6 1.382
-02.0 90 70.56 2848 3062 43319 11747 93.6 1.350
+00.0 92 72.00 2908 3193 45975 12018 94.6 1.318
+02.0 94 73.44 2969 3327 48809 12275 95.5 1.287
+04.0 96 74.88 3029 3463 51834 12519 96.3 1.251
+06.0 98 76.32 3089 3603 55065 12747 97.0 1.216 ! Near Maximum !
+08.0 100 77.76 3150 3745 58518 12959 97.7 1.183 ! Near Maximum !
+10.0 102 79.20 3210 3890 62199 13153 98.3 1.150 ! Near Maximum !
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 92 72.00 3081 3583 55687 12231 99.2 1.217 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 92 72.00 2693 2737 37406 11165 85.9 1.425
