Quick load; 300 HH please.

[salmonchaser]

Need a little help with Vitavori N165 and 560
Nosler AccuBond 180 @ 3.637
Barnes ttsx 180 @. 3.631
Thanks in advance.

 

[DrMike]

Cartridge          : .300 H.& H. Mag.
Bullet             : .308, 180, Barnes 'TTSX'BT 30372
Useable Case Capaci: 72.993 grain H2O = 4.739 cm³
Cartridge O.A.L. L6: 3.631 inch = 92.23 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N165 *C

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   97    64.44   2617    2737   43128  10057     95.7    1.355
-09.0   98    65.16   2647    2801   44660  10169     96.1    1.333
-08.0   99    65.87   2677    2865   46254  10277     96.6    1.312
-07.0  100    66.59   2708    2930   47901  10381     97.0    1.291
-06.0  101    67.30   2738    2996   49603  10481     97.4    1.271
-05.0  102    68.02   2768    3062   51364  10577     97.7    1.251
-04.0  103    68.74   2798    3129   53190  10668     98.1    1.231  ! Near Maximum !
-03.0  104    69.45   2828    3197   55085  10754     98.4    1.211  ! Near Maximum !
-02.0  105    70.17   2859    3266   57054  10836     98.6    1.192  ! Near Maximum !
-01.0  107    70.88   2889    3335   59099  10912     98.9    1.174  ! Near Maximum !
+00.0  108    71.60   2919    3405   61224  10984     99.1    1.155  ! Near Maximum !
+01.0  109    72.32   2949    3476   63433  11051     99.3    1.137  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    73.03   2979    3547   65729  11112     99.5    1.119  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    73.75   3009    3619   68119  11167     99.7    1.102  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    74.46   3039    3691   70605  11217     99.8    1.085  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    75.18   3069    3764   73194  11261     99.9    1.068  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    108    71.60   2990    3572   67465  10844    100.0    1.110  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    108    71.60   2835    3212   55061  10970     97.1    1.208  ! Near Maximum !

Cartridge          : .300 H.& H. Mag.
Bullet             : .308, 180, Barnes 'TTSX'BT 30372
Useable Case Capaci: 72.993 grain H2O = 4.739 cm³
Cartridge O.A.L. L6: 3.631 inch = 92.23 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N560 *C

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   95    65.16   2711    2937   43258  11516     92.7    1.338
-09.0   96    65.88   2744    3009   44777  11668     93.3    1.316
-08.0   97    66.61   2777    3082   46351  11815     93.9    1.295
-07.0   98    67.33   2810    3155   47984  11959     94.4    1.274
-06.0   99    68.06   2843    3230   49682  12099     95.0    1.254
-05.0  100    68.78   2876    3305   51444  12234     95.4    1.234
-04.0  101    69.50   2909    3382   53275  12364     95.9    1.214  ! Near Maximum !
-03.0  102    70.23   2942    3459   55178  12489     96.4    1.195  ! Near Maximum !
-02.0  103    70.95   2975    3538   57158  12610     96.8    1.176  ! Near Maximum !
-01.0  104    71.68   3008    3617   59217  12725     97.2    1.157  ! Near Maximum !
+00.0  105    72.40   3041    3697   61358  12834     97.6    1.138  ! Near Maximum !
+01.0  106    73.12   3075    3778   63586  12938     97.9    1.120  !DANGEROUS LOAD-DO NOT USE!
+02.0  107    73.85   3108    3860   65907  13036     98.2    1.102  !DANGEROUS LOAD-DO NOT USE!
+03.0  108    74.57   3141    3943   68324  13128     98.5    1.085  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    75.30   3174    4026   70842  13214     98.8    1.068  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    76.02   3207    4111   73467  13293     99.1    1.051  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    105    72.40   3128    3912   68170  12820     99.4    1.090  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    105    72.40   2941    3456   55007  12658     94.6    1.193  ! Near Maximum !

 

[DrMike]

Cartridge          : .300 H.& H. Mag.
Bullet             : .308, 180, Nosler AccuBond 54825
Useable Case Capaci: 75.000 grain H2O = 4.870 cm³
Cartridge O.A.L. L6: 3.637 inch = 92.38 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N560 *C

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   94    66.24   2718    2953   43220  11779     93.0    1.339
-09.0   95    66.98   2751    3025   44726  11934     93.6    1.318
-08.0   96    67.71   2784    3098   46288  12084     94.1    1.297
-07.0   97    68.45   2817    3171   47908  12230     94.6    1.276
-06.0   98    69.18   2850    3246   49590  12372     95.2    1.255
-05.0   99    69.92   2883    3321   51336  12510     95.6    1.235
-04.0  100    70.66   2916    3398   53150  12642     96.1    1.216  ! Near Maximum !
-03.0  101    71.39   2949    3475   55032  12770     96.6    1.196  ! Near Maximum !
-02.0  102    72.13   2982    3553   56989  12892     97.0    1.177  ! Near Maximum !
-01.0  103    72.86   3015    3632   59023  13009     97.4    1.159  ! Near Maximum !
+00.0  104    73.60   3048    3712   61136  13121     97.7    1.140  ! Near Maximum !
+01.0  105    74.34   3080    3793   63337  13227     98.1    1.122  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    75.07   3113    3874   65625  13327     98.4    1.105  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    75.81   3146    3957   68007  13420     98.7    1.087  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    76.54   3179    4040   70479  13508     98.9    1.070  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    77.28   3212    4124   73041  13589     99.1    1.053  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    104    73.60   3134    3926   67869  13099     99.4    1.092  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    104    73.60   2947    3472   54790  12948     94.8    1.196  ! Near Maximum !

Cartridge          : .300 H.& H. Mag.
Bullet             : .308, 180, Nosler AccuBond 54825
Useable Case Capaci: 75.000 grain H2O = 4.870 cm³
Cartridge O.A.L. L6: 3.637 inch = 92.38 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Vihtavuori N165 *C

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   96    65.61   2628    2759   43297  10299     95.9    1.353
-09.0   97    66.34   2658    2823   44822  10413     96.4    1.332
-08.0   98    67.07   2688    2888   46396  10523     96.8    1.311
-07.0   99    67.80   2718    2953   48022  10628     97.2    1.290
-06.0  100    68.53   2748    3019   49705  10729     97.6    1.270
-05.0  101    69.26   2778    3085   51450  10826     97.9    1.249
-04.0  102    69.98   2808    3152   53260  10919     98.2    1.230  ! Near Maximum !
-03.0  103    70.71   2839    3220   55137  11006     98.5    1.211  ! Near Maximum !
-02.0  104    71.44   2869    3289   57086  11088     98.8    1.192  ! Near Maximum !
-01.0  106    72.17   2899    3358   59108  11166     99.0    1.173  ! Near Maximum !
+00.0  107    72.90   2929    3428   61208  11238     99.2    1.155  ! Near Maximum !
+01.0  108    73.63   2959    3498   63390  11305     99.4    1.137  !DANGEROUS LOAD-DO NOT USE!
+02.0  109    74.36   2988    3570   65656  11366     99.6    1.119  !DANGEROUS LOAD-DO NOT USE!
+03.0  110    75.09   3018    3641   68012  11422     99.7    1.102  !DANGEROUS LOAD-DO NOT USE!
+04.0  111    75.82   3048    3713   70462  11472     99.8    1.085  !DANGEROUS LOAD-DO NOT USE!
+05.0  112    76.55   3078    3786   73010  11516     99.9    1.068  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    107    72.90   2999    3594   67383  11085    100.0    1.109  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    107    72.90   2845    3236   55126  11233     97.3    1.207  ! Near Maximum !

 

[salmonchaser]

Thank you Dr. Mike

 

[salmonchaser]

Need a little help understanding my results. Accuracy is good at several loadings but attained velocity is quite a bit higher.
69gr. N560/180ttsx/3080 fps/new brass/ my rifle has a 26 inch bbl/coal3.586
69.2 N560/180nab/new brass/3.589coal/3012fps
72.1n560/180nab/3.586/gave 3145fps and sticky bolt.
When looking at B time; what do I want to see for a node?

 

[RL338]

When looking at B time; what do I want to see for a node?

Find your barrel length on the left side and move along to the right to see if any of those Node numbers match the BT number from QL estimate.

 

[salmonchaser]

Ok, that makes sense but I gave Dr Mike bad intel ran the data with a 24 instead of a 26 inch barrel and I am running about 2 grains less powder for the same velocity as tested. If my load at 67.5 gr. Gave me 2975 and a B time of of 1.17 is the difference from 1.17 and 1.19 significant for these purposes?

 

[RL338]

A lot of times the top BT node is slightly above maximum pressure. I’ve had decent luck splitting the difference , adding 2 consecutive node together and dividing by 2 and find the middle of a node. Most times backing down to the next one is the best option. Before ordering a barrel I mock up bullets I want to run and powders I have , to find an optimal barrel length. Sometimes the BT node doesn’t pan out , that’s where traditional load developing comes to play.