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2400 load.... (Read 511 times)
leadhead
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2400 load....
Dec 11th, 2018 at 2:18am
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Would you consider 16.5 grains of 2400 under a 200 gr cast
bullet a soft load for the Krag?
Thanks for any info.
Denny
  
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Hoot
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Re: 2400 load....
Reply #1 - Dec 11th, 2018 at 8:03pm
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My Lyman doesn't show 2400 for anything heavier than 169gr. and, for that, it shows 18-23gr. Without having any further data, I'd be hesitant to say with certainty but it sounds like a light load.
  
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Re: 2400 load....
Reply #2 - Dec 11th, 2018 at 9:55pm
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Lyman Cast Bullet Handbook, 3d ed. gives 16 gr. 2400 as starting load for 311290 (208 gr.) @1415 fps. 21 gr. maximum @1716 fps. Tested in 22" barrel.

QuickLOAD estimates ~21K psi for 16.5 gr. - fairly low pressure. (This is not tested data) -

Cartridge          : .30-40 Krag
Bullet             : .308, 202, LYM LRN GC 311299
Cartridge O.A.L. L6: 3.089 inch or 78.46 mm
Barrel Length      : 30.0 inch or 762.0 mm
Powder             : Alliant 2400

Predicted data by increasing and decreasing the given charge,
incremented in steps of 6.061% 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

-12.1   33    14.50   1544    1085   16597   2245    100.0    2.615
-06.1   35    15.50   1610    1180   18765   2367    100.0    2.470
+00.0   37    16.50   1673    1275   21076   2489    100.0    2.343
+06.1   39    17.50   1735    1370   23529   2610    100.0    2.230
+12.1   42    18.50   1794    1465   26128   2729    100.0    2.129
+18.2   44    19.50   1851    1560   28875   2848    100.0    2.038
+24.2   46    20.50   1907    1655   31775   2965    100.0    1.956
+30.3   48    21.50   1961    1751   34830   3081    100.0    1.882
  
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leadhead
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Re: 2400 load....
Reply #3 - Dec 11th, 2018 at 10:33pm
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Thanks guys... I have the books, and use 2400 in most all my
military rifles. But I've read some things like you shouldn't use
fast pistol powders in the Krag. That's why I asked. It shoots
great in the Krag and I have never seen signs of over pressure.
  I've found it to be the best powder in my rifles and can get
some really impressive groups at 200 yards. Thanks for the
replies.
Denny
  
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