Quick load request .264 Win Mag

[filmjunkie4ever]

I would like to request quick load for .264 Win Mag, 142 grain ABLR with Retumbo powder. A 24” barrel with the factory standard twist 1-8 or 1-9 I can’t remember.


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[DrMike]

Cartridge          : .264 Win. Mag.
Bullet             : .264, 142, Nosler AccuBond LR 58922
Useable Case Capaci: 74.114 grain H2O = 4.812 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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    64.17   2793    2459   43261  14244     99.8    1.441
-09.0   94    64.88   2825    2516   44797  14338     99.9    1.417
-08.0   95    65.60   2858    2574   46391  14420    100.0    1.393
-07.0   97    66.31   2890    2633   48047  14493    100.0    1.370
-06.0   98    67.02   2922    2691   49766  14563    100.0    1.348
-05.0   99    67.74   2954    2750   51553  14632    100.0    1.326
-04.0  100    68.45   2985    2810   53409  14700    100.0    1.304  ! Near Maximum !
-03.0  101    69.16   3017    2869   55337  14767    100.0    1.283  ! Near Maximum !
-02.0  102    69.87   3048    2929   57342  14833    100.0    1.262  ! Near Maximum !
-01.0  103    70.59   3079    2989   59427  14898    100.0    1.241  ! Near Maximum !
+00.0  104    71.30   3110    3049   61598  14961    100.0    1.221  ! Near Maximum !
+01.0  105    72.01   3141    3110   63850  15023    100.0    1.202  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    72.73   3172    3171   66203  15084    100.0    1.182  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    73.44   3202    3233   68651  15143    100.0    1.163  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    74.15   3233    3295   71194  15201    100.0    1.145  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    74.87   3263    3357   73828  15258    100.0    1.126  !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    104    71.30   3236    3302   76598  14425    100.0    1.120  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    71.30   2915    2679   48456  15554     99.1    1.355

 

[filmjunkie4ever]

Thank you Dr.Mike. I hate to impose but could I also have you run this with the same parameters but with the 140 grain AccuBond? Please?


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[DrMike]

Cartridge          : .264 Win. Mag.
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 74.854 grain H2O = 4.860 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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    64.80   2809    2453   43252  14385     99.8    1.431
-09.0   94    65.52   2842    2510   44790  14483     99.9    1.408
-08.0   95    66.24   2874    2568   46385  14569    100.0    1.385
-07.0   97    66.96   2907    2627   48042  14644    100.0    1.362
-06.0   98    67.68   2939    2686   49764  14714    100.0    1.340
-05.0   99    68.40   2971    2745   51552  14784    100.0    1.318
-04.0  100    69.12   3003    2804   53410  14852    100.0    1.296  ! Near Maximum !
-03.0  101    69.84   3035    2864   55341  14919    100.0    1.275  ! Near Maximum !
-02.0  102    70.56   3067    2924   57348  14985    100.0    1.254  ! Near Maximum !
-01.0  103    71.28   3098    2984   59437  15050    100.0    1.234  ! Near Maximum !
+00.0  104    72.00   3130    3045   61595  15114    100.0    1.214  ! Near Maximum !
+01.0  105    72.72   3161    3106   63870  15176    100.0    1.194  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    73.44   3192    3167   66224  15237    100.0    1.175  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    74.16   3223    3229   68673  15297    100.0    1.156  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    74.88   3253    3291   71220  15355    100.0    1.137  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    75.60   3284    3353   73857  15412    100.0    1.119  !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    104    72.00   3258    3299   76609  14573    100.0    1.112  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    72.00   2932    2672   48464  15695     99.0    1.347

 

[SJB358]

That 140 load with Retumbo shoots amazing in my rifle. 3220 from my 26” barrel.





Only at 69.3 in Nosler brass with my current lot of Retumbo.

 

[DrMike]

Cartridge          : .264 Win. Mag.
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 74.854 grain H2O = 4.860 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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    64.80   2809    2453   43252  14385     99.8    1.431
-09.0   94    65.52   2842    2510   44790  14483     99.9    1.408
-08.0   95    66.24   2874    2568   46385  14569    100.0    1.385
-07.0   97    66.96   2907    2627   48042  14644    100.0    1.362
-06.0   98    67.68   2939    2686   49764  14714    100.0    1.340
-05.0   99    68.40   2971    2745   51552  14784    100.0    1.318
-04.0  100    69.12   3003    2804   53410  14852    100.0    1.296  ! Near Maximum !
-03.0  101    69.84   3035    2864   55341  14919    100.0    1.275  ! Near Maximum !
-02.0  102    70.56   3067    2924   57348  14985    100.0    1.254  ! Near Maximum !
-01.0  103    71.28   3098    2984   59437  15050    100.0    1.234  ! Near Maximum !
+00.0  104    72.00   3130    3045   61595  15114    100.0    1.214  ! Near Maximum !
+01.0  105    72.72   3161    3106   63870  15176    100.0    1.194  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    73.44   3192    3167   66224  15237    100.0    1.175  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    74.16   3223    3229   68673  15297    100.0    1.156  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    74.88   3253    3291   71220  15355    100.0    1.137  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    75.60   3284    3353   73857  15412    100.0    1.119  !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    104    72.00   3258    3299   76609  14573    100.0    1.112  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    72.00   2932    2672   48464  15695     99.0    1.347