AA2460 has a burning rate appropriate for most medium-weight bullets in the .30/40 Krag. Figures below are QuickLOAD software estimates,
not load data, and indicate that a 36-grain charge with a 180-grain jacketed bullet might be a reasonable, conservative maximum. This tracks well with Accurate's data for the similar-capacity .303 British, shown below QL estimates, which lists 36.5 as a starting load.
Cartridge : .30-40 Krag
Bullet : .308, 180, Sierra SPRN 2170
Cartridge O.A.L. L6: 2.714 inch or 68.94 mm
Barrel Length : 30.0 inch or 762.0 mm
Powder : Accurate 2460
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.25% 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
-12.5 71 31.50 2117 1791 27785 4166 96.0 1.933
-11.3 72 31.95 2144 1837 28771 4223 96.4 1.904
-10.0 73 32.40 2171 1883 29792 4279 96.8 1.877
-08.8 74 32.85 2197 1930 30847 4333 97.2 1.850
-07.5 75 33.30 2224 1977 31939 4385 97.6 1.824
-06.3 76 33.75 2250 2024 33069 4435 97.9 1.797
-05.0 77 34.20 2277 2072 34237 4483 98.2 1.772
-03.8 78 34.65 2303 2120 35446 4530 98.5 1.747
-02.5 79 35.10 2329 2168 36697 4574 98.8 1.722
-01.3 80 35.55 2355 2217 37990 4617 99.0 1.696
+00.0 81 36.00 2381 2266 39329 4657 99.2 1.671
+01.3 82 36.45 2407 2315 40714 4695 99.4 1.645 ! Near Maximum !
+02.5 83 36.90 2432 2365 42148 4731 99.5 1.620 ! Near Maximum !
+03.8 84 37.35 2458 2415 43631 4765 99.7 1.595 ! Near Maximum !
+05.0 85 37.80 2483 2465 45167 4797 99.8 1.572 ! Near Maximum !
+06.3 86 38.25 2509 2515 46757 4826 99.9 1.549 !DANGEROUS LOAD-DO NOT USE!
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