Quick Load for .300 Winchester Magnum

[jagermeister]

Hi Gents, I am starting a "campaign" on this caliber.... :wink: ...and need to get some data to begin reloading.
I have brass, powders, bullets and primers, along with Dies & Co. but I need some figures....

Got a barrel on order and hopefully it will get to me shortly....

Could you please run Quick Load for the two following combinations ?

Barrel is a 26" - 1:11 twist rate

1. Berger Hybrid 215 grs. bullet + Norma MRP Powder

2. Berger Hybrid 215 grs. bullet + Hogdgon H1000 powder


I appreciate your help very much.

Thanks


JM

 

[DrMike]

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 215, Berger Hybrid G7 #30423
Useable Case Capaci: 76.875 grain H2O = 4.991 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Norma MRP

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   78    57.60   2285    2493   31749  10420     95.4    1.688
-18.0   80    59.04   2343    2620   33960  10714     96.4    1.645
-16.0   82    60.48   2400    2750   36329  10990     97.3    1.603
-14.0   84    61.92   2458    2883   38870  11248     98.0    1.554
-12.0   86    63.36   2515    3019   41595  11485     98.7    1.504
-10.0   88    64.80   2571    3157   44522  11701     99.2    1.457
-08.0   90    66.24   2628    3297   47640  11894     99.6    1.412
-06.0   92    67.68   2684    3439   50950  12062     99.8    1.369
-04.0   93    69.12   2740    3583   54486  12206    100.0    1.327  ! Near Maximum !
-02.0   95    70.56   2795    3729   58265  12326    100.0    1.287  ! Near Maximum !
+00.0   97    72.00   2849    3876   62308  12439    100.0    1.249  ! Near Maximum !
+02.0   99    73.44   2904    4025   66636  12548    100.0    1.211  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    74.88   2957    4175   71274  12653    100.0    1.176  !DANGEROUS LOAD-DO NOT USE!
+06.0  103    76.32   3011    4327   76249  12754    100.0    1.141  !DANGEROUS LOAD-DO NOT USE!
+08.0  105    77.76   3064    4481   81591  12851    100.0    1.108  !DANGEROUS LOAD-DO NOT USE!
+10.0  107    79.20   3117    4637   87335  12943    100.0    1.076  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     97    72.00   2959    4179   75853  11966    100.0    1.153  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    72.00   2683    3437   49186  12749     98.0    1.377

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 215, Berger Hybrid G7 #30423
Useable Case Capaci: 76.875 grain H2O = 4.991 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H1000

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   87    61.04   2227    2367   30909   9882     91.0    1.685
-18.0   89    62.57   2287    2498   33128  10213     92.4    1.639
-16.0   91    64.09   2349    2633   35522  10530     93.8    1.593
-14.0   94    65.62   2410    2773   38103  10829     95.0    1.543
-12.0   96    67.14   2472    2917   40891  11109     96.1    1.492
-10.0   98    68.67   2534    3065   43902  11367     97.1    1.442
-08.0  100    70.20   2596    3217   47163  11601     97.9    1.394
-06.0  102    71.72   2658    3373   50698  11809     98.6    1.347
-04.0  105    73.25   2720    3532   54535  11990     99.2    1.302  ! Near Maximum !
-02.0  107    74.77   2782    3695   58708  12141     99.6    1.259  ! Near Maximum !
+00.0  109    76.30   2844    3861   63259  12262     99.9    1.217  ! Near Maximum !
+02.0  111    77.83   2905    4030   68226  12350    100.0    1.176  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    79.35   2967    4202   73660  12409    100.0    1.137  !DANGEROUS LOAD-DO NOT USE!
+06.0  115    80.88   3028    4376   79629  12460    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+08.0  118    82.40   3088    4554   86190  12505    100.0    1.062  !DANGEROUS LOAD-DO NOT USE!
+10.0  120    83.93   3149    4735   93438  12542    100.0    1.027  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    109    76.30   2971    4213   77499  11702    100.0    1.123  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    109    76.30   2656    3367   51031  12233     95.3    1.339

 

[jagermeister]

Thanks Doc, swift as a bullet...as usual !

Do you think 24" barrel length makes a substantial difference, or I can use these data for the 26" as well, with no problems ?

:mrgreen:

 

[DrMike]

Chamber pressures will not change. Velocity will go up 50-70 fps.