06-12-2012, 01:03 PM
Guys, I was reminded of the COAL I used being 2.5 inch as compared to 2.260. So I ran a fresh set and here's where we stand:
Cartridge : 6.5 mm Grendel
Bullet : .264, 123, Lapua Scenar GB489 6032
Useable Case Capaci: 27.837 grain H2O = 1.807 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N550
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
+00.0 114 29.88 2560 1790 51340 6454 94.4 1.232 ! Near Maximum !
Cartridge : 6.5 mm Grendel
Bullet : .264, 123, Lapua Scenar GB489 6032
Useable Case Capaci: 27.837 grain H2O = 1.807 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N550
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
+00.0 114 29.88 2560 1790 51340 6454 94.4 1.232 ! Near Maximum !