300 Win Mag with a Barnes 180 TTSX QL request

PaLuke · May 31, 2021

Good Morning. I’m loading for a 300 win mag with a 180 grain TTSX. The powders I have are H4350 and H4831. The local store has some IMR 4955 also. If it’s possible I’d appreciate a QL for the H4350 and the 4955. Thank you very much. Take care.

DrMike · May 31, 2021

Code:

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 180, Barnes 'TTSX'BT 30372
Useable Case Capaci: 77.945 grain H2O = 5.061 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4350 *T

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

-10.0   88    62.19   2643    2792   46739  11376     97.0    1.256
-09.0   89    62.88   2671    2851   48168  11498     97.3    1.238
-08.0   90    63.57   2698    2909   49640  11616     97.6    1.221
-07.0   91    64.26   2725    2969   51154  11731     97.9    1.203
-06.0   92    64.95   2753    3028   52713  11841     98.2    1.187
-05.0   93    65.65   2780    3088   54318  11949     98.5    1.170
-04.0   94    66.34   2807    3149   55970  12052     98.7    1.154  ! Near Maximum !
-03.0   95    67.03   2834    3210   57670  12151     98.9    1.137  ! Near Maximum !
-02.0   96    67.72   2861    3272   59421  12246     99.1    1.122  ! Near Maximum !
-01.0   97    68.41   2888    3334   61225  12337     99.3    1.107  ! Near Maximum !
+00.0   98    69.10   2915    3396   63082  12423     99.5    1.092  ! Near Maximum !
+01.0   99    69.79   2942    3459   64996  12505     99.6    1.077  !DANGEROUS LOAD-DO NOT USE!
+02.0  100    70.48   2968    3522   66967  12582     99.7    1.062  !DANGEROUS LOAD-DO NOT USE!
+03.0  101    71.17   2995    3585   68998  12655     99.8    1.048  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    71.86   3021    3649   71092  12723     99.9    1.034  !DANGEROUS LOAD-DO NOT USE!
+05.0  103    72.56   3048    3713   73250  12786    100.0    1.020  !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     98    69.10   3024    3654   73540  12060    100.0    1.020  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     98    69.10   2762    3050   52701  12278     95.4    1.184

Code:

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 180, Barnes 'TTSX'BT 30372
Useable Case Capaci: 77.945 grain H2O = 5.061 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 4955 Enduron *C*T

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

-10.0   93    64.98   2628    2760   46234  11528     93.6    1.258
-09.0   94    65.70   2657    2821   47704  11674     94.1    1.240
-08.0   95    66.42   2686    2883   49221  11817     94.6    1.221
-07.0   96    67.15   2715    2946   50786  11957     95.0    1.204
-06.0   97    67.87   2744    3009   52402  12094     95.5    1.186
-05.0   98    68.59   2773    3073   54070  12228     95.9    1.169
-04.0   99    69.31   2802    3138   55792  12359     96.3    1.151  ! Near Maximum !
-03.0  100    70.03   2831    3203   57571  12486     96.6    1.135  ! Near Maximum !
-02.0  101    70.76   2860    3269   59408  12609     97.0    1.118  ! Near Maximum !
-01.0  102    71.48   2889    3336   61305  12729     97.3    1.102  ! Near Maximum !
+00.0  103    72.20   2918    3404   63266  12845     97.6    1.086  ! Near Maximum !
+01.0  104    72.92   2947    3472   65292  12957     97.9    1.071  !DANGEROUS LOAD-DO NOT USE!
+02.0  105    73.64   2976    3540   67387  13064     98.2    1.055  !DANGEROUS LOAD-DO NOT USE!
+03.0  106    74.37   3005    3610   69553  13168     98.5    1.040  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    75.09   3034    3680   71794  13267     98.7    1.025  !DANGEROUS LOAD-DO NOT USE!
+05.0  108    75.81   3063    3750   74112  13361     98.9    1.011  !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    103    72.20   3046    3707   73862  12775     99.9    1.014  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    72.20   2751    3025   52862  12362     91.8    1.180

PaLuke · May 31, 2021

Thank you very much for the information. I’m going to try the H4831SC first and then the 4955. Thanks again. I’ll post my results first chance I get. Take care.

DrMike · May 31, 2021

Trust one of the powders will work out for you. I used the 180 TSX for a number of years in my 300 WSM, and it accounted for a variety of big game here in BC. I liked the bullet, and the TTSX is even better.