Thread: Powder for 6.5 06 and 140gr projectile

Make sure you work up - both these powders look excellent (case full and 100% burn)

Vihtivouri N560

Cartridge : 6.5-06 A-Square
Bullet : .264, 140, Sierra SPBT 1730
Useable Case Capaci: 62.717 grain H2O = 4.072 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 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 81 48.00 2534 1997 34878 11127 92.1 1.578
-18.0 83 49.20 2599 2100 37347 11470 93.4 1.535
-16.0 85 50.40 2664 2206 39992 11799 94.5 1.485
-14.0 87 51.60 2728 2314 42830 12111 95.5 1.438
-12.0 89 52.80 2793 2425 45875 12406 96.5 1.392
-10.0 91 54.00 2858 2539 49122 12681 97.3 1.348
-08.0 93 55.20 2922 2654 52571 12935 98.0 1.306
-06.0 95 56.40 2986 2772 56257 13166 98.6 1.266 ! Near Maximum !
-04.0 98 57.60 3050 2892 60201 13374 99.1 1.227 ! Near Maximum !

H4831SC
Cartridge : 6.5-06 A-Square
Bullet : .264, 140, Sierra SPBT 1730
Useable Case Capaci: 62.717 grain H2O = 4.072 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Hodgdon H4831 SC

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 79 46.40 2450 1866 34276 9973 91.6 1.588
-18.0 81 47.56 2510 1959 36647 10280 92.8 1.545
-16.0 83 48.72 2571 2055 39169 10577 93.9 1.498
-14.0 85 49.88 2632 2153 41874 10861 94.9 1.451
-12.0 87 51.04 2693 2254 44759 11131 95.9 1.406
-10.0 89 52.20 2754 2357 47816 11388 96.7 1.363
-08.0 91 53.36 2814 2462 51073 11628 97.5 1.322
-06.0 93 54.52 2875 2569 54556 11851 98.1 1.282
-04.0 95 55.68 2935 2678 58283 12057 98.7 1.243 ! Near Maximum !
-02.0 97 56.84 2996 2790 62273 12242 99.1 1.206 ! Near Maximum !