QL request - 25/06

[boomer68]

Hi guys,

Could someone please run a powder comparison for the 120gr Hornady HP?

Thinking of trying RL25, Retumbo and 7828. Just wondering how they compare in prediction.

Thanks!

 

[DrMike]

Cartridge : .25-06 Rem.
Bullet : .257, 120, Hornady HP 2560
Useable Case Capaci: 60.229 grain H2O = 3.911 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 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 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   91    50.88   2493    1657   30314  11336     91.8    1.570
-18.0   93    52.15   2566    1755   32583  11738     93.5    1.526
-16.0   96    53.42   2640    1856   35037  12112     95.1    1.482
-14.0   98    54.69   2713    1962   37697  12453     96.4    1.436
-12.0  100    55.97   2787    2070   40583  12757     97.6    1.385
-10.0  103    57.24   2861    2182   43714  13022     98.5    1.337
-08.0  105    58.51   2935    2296   47120  13244     99.2    1.290
-06.0  107    59.78   3009    2412   50828  13420     99.7    1.244
-04.0  109    61.05   3082    2531   54875  13547    100.0    1.201
-02.0  112    62.32   3154    2651   59295  13628    100.0    1.158  ! Near Maximum !
+00.0  114    63.60   3226    2773   64137  13696    100.0    1.118  ! Near Maximum !
+02.0  116    64.87   3297    2896   69447  13757    100.0    1.078  !DANGEROUS LOAD-DO NOT USE!
+04.0  118    66.14   3367    3022   75289  13812    100.0    1.040  !DANGEROUS LOAD-DO NOT USE!
+06.0  121    67.41   3437    3149   81731  13860    100.0    1.004  !DANGEROUS LOAD-DO NOT USE!
+08.0  123    68.68   3507    3278   88858  13900    100.0    0.968  !DANGEROUS LOAD-DO NOT USE!
+10.0  125    69.96   3577    3409   96758  13933    100.0    0.934  !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 114 63.60 3375 3036 80262 13092 100.0 1.023 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 114 63.60 2995 2389 50833 14016 97.2 1.242

Cartridge : .25-06 Rem.
Bullet : .257, 120, Hornady HP 2560
Useable Case Capaci: 60.229 grain H2O = 3.911 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-25

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   86    47.36   2540    1719   31797  11136     95.5    1.541
-18.0   88    48.54   2607    1811   34074  11452     96.7    1.499
-16.0   90    49.73   2674    1905   36522  11741     97.7    1.458
-14.0   92    50.91   2741    2001   39152  12002     98.5    1.412
-12.0   94    52.10   2807    2100   41989  12231     99.1    1.366
-10.0   96    53.28   2873    2199   45041  12428     99.6    1.321
-08.0   99    54.46   2939    2301   48333  12590     99.9    1.278
-06.0  101    55.65   3003    2403   51884  12716    100.0    1.237
-04.0  103    56.83   3067    2507   55719  12820    100.0    1.197  ! Near Maximum !
-02.0  105    58.02   3131    2612   59867  12919    100.0    1.160  ! Near Maximum !
+00.0  107    59.20   3193    2717   64359  13014    100.0    1.123  ! Near Maximum !
+02.0  109    60.38   3255    2824   69224  13105    100.0    1.087  !DANGEROUS LOAD-DO NOT USE!
+04.0  111    61.57   3317    2931   74519  13190    100.0    1.053  !DANGEROUS LOAD-DO NOT USE!
+06.0  114    62.75   3378    3041   80270  13271    100.0    1.020  !DANGEROUS LOAD-DO NOT USE!
+08.0  116    63.94   3439    3151   86493  13346    100.0    0.988  !DANGEROUS LOAD-DO NOT USE!
+10.0  118    65.12   3499    3263   93237  13415    100.0    0.958  !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 107 59.20 3317 2932 79503 12530 100.0 1.034 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 59.20 3002 2402 51149 13492 98.8 1.239

Cartridge : .25-06 Rem.
Bullet : .257, 120, Hornady HP 2560
Useable Case Capaci: 60.229 grain H2O = 3.911 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828

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   85    45.60   2514    1685   32244  10733     89.0    1.526
-18.0   87    46.74   2581    1775   34514  11100     90.5    1.485
-16.0   89    47.88   2648    1868   36949  11453     91.9    1.444
-14.0   91    49.02   2715    1964   39562  11791     93.2    1.398
-12.0   93    50.16   2782    2062   42365  12111     94.4    1.353
-10.0   95    51.30   2849    2163   45385  12413     95.5    1.310
-08.0   97    52.44   2917    2267   48629  12694     96.5    1.268
-06.0   99    53.58   2984    2373   52122  12952     97.4    1.227
-04.0  101    54.72   3052    2481   55886  13185     98.1    1.189  ! Near Maximum !
-02.0  104    55.86   3119    2592   59950  13392     98.7    1.151  ! Near Maximum !
+00.0  106    57.00   3186    2704   64336  13572     99.2    1.115  ! Near Maximum !
+02.0  108    58.14   3252    2818   69084  13722     99.6    1.080  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    59.28   3318    2934   74227  13841     99.9    1.046  !DANGEROUS LOAD-DO NOT USE!
+06.0  112    60.42   3384    3052   79805  13928    100.0    1.014  !DANGEROUS LOAD-DO NOT USE!
+08.0  114    61.56   3449    3171   85839  13987    100.0    0.982  !DANGEROUS LOAD-DO NOT USE!
+10.0  116    62.70   3514    3291   92370  14037    100.0    0.952  !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 106 57.00 3334 2961 78244 13097 100.0 1.029 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 57.00 2976 2361 51902 13285 93.7 1.227

 

[boomer68]

Many thanks DrMike