Cartridge : .458 Win.Mag.
Bullet : .458, 400, Speer FN 2479
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder- 7
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.735% 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
-07.4 79 63.00 2253 4510 49760 4801 100.0 1.325
-06.6 80 63.50 2266 4559 50734 4825 100.0 1.314
-05.9 80 64.00 2278 4609 51725 4850 100.0 1.303
-05.1 81 64.50 2290 4659 52732 4874 100.0 1.292
-04.4 81 65.00 2303 4709 53756 4898 100.0 1.281 ! Near Maximum !
-03.7 82 65.50 2315 4759 54797 4922 100.0 1.270 ! Near Maximum !
-02.9 83 66.00 2327 4809 55856 4946 100.0 1.260 ! Near Maximum !
-02.2 83 66.50 2339 4859 56932 4970 100.0 1.250 ! Near Maximum !
-01.5 84 67.00 2351 4910 58026 4994 100.0 1.240 ! Near Maximum !
-00.7 85 67.50 2363 4960 59139 5017 100.0 1.230 ! Near Maximum !
+00.0 85 68.00 2375 5011 60270 5041 100.0 1.220 ! Near Maximum !
+00.7 86 68.50 2387 5061 61421 5064 100.0 1.210 ! Near Maximum !
+01.5 86 69.00 2399 5112 62590 5087 100.0 1.201 !DANGEROUS LOAD-DO NOT USE!
+02.2 87 69.50 2411 5163 63780 5110 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
+02.9 88 70.00 2423 5214 64990 5133 100.0 1.182 !DANGEROUS LOAD-DO NOT USE!
+03.7 88 70.50 2435 5265 66221 5156 100.0 1.173 !DANGEROUS LOAD-DO NOT USE!