hi where can i find info on using vit n140 for the 100gr bullets its only printed up in the manuals i have for bullets below 87gr. i have a couple of kg of n140 as at the moment im only using 85gr bullets and i can find data for this bullet weight but not above. it all recomends n150 or n160 for 243win loads.
Cartridge : .243 Win.
Bullet : .243, 100, Hornady BTSP 2453
Useable Case Capaci: 49.611 grain H2O = 3.221 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : Vihtavuori N140
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 68 30.40 2328 1203 33488 9442 99.6 1.382
-18.0 69 31.16 2375 1253 35472 9621 99.8 1.352
-16.0 71 31.92 2422 1303 37553 9784 100.0 1.319
-14.0 73 32.68 2468 1353 39735 9931 100.0 1.284
-12.0 75 33.44 2514 1403 42024 10070 100.0 1.250
-10.0 76 34.20 2559 1454 44424 10207 100.0 1.218
-08.0 78 34.96 2603 1504 46939 10342 100.0 1.186
-06.0 80 35.72 2646 1555 49576 10476 100.0 1.156
-04.0 81 36.48 2689 1606 52340 10606 100.0 1.128 ! Near Maximum !
-02.0 83 37.24 2732 1657 55236 10735 100.0 1.100 ! Near Maximum !
+00.0 85 38.00 2774 1708 58273 10862 100.0 1.073 ! Near Maximum !
+02.0 86 38.76 2815 1760 61457 10986 100.0 1.048 !DANGEROUS LOAD-DO NOT USE!
+04.0 88 39.52 2857 1812 64796 11108 100.0 1.023 !DANGEROUS LOAD-DO NOT USE!
+06.0 90 40.28 2897 1864 68298 11228 100.0 0.999 !DANGEROUS LOAD-DO NOT USE!
+08.0 92 41.04 2938 1917 71972 11345 100.0 0.976 !DANGEROUS LOAD-DO NOT USE!
+10.0 93 41.80 2978 1969 75828 11460 100.0 0.954 !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 85 38.00 2842 1794 67004 10612 100.0 1.009 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 85 38.00 2672 1585 49257 11222 100.0 1.159