QL request… 280 Ackley

nhenry

Handloader
Feb 7, 2022
590
1,009
I picked up a lot of 131gr Hammer Hunters for cheap and want to work with H4831/H4831sc. 24” barrel. I’d like to get up to mid 3200s… should be a good mix between the 143 HH and 120gr TTSX.

If you could also, I have 169gr Hammers and would like to use the same thing.

All help is appreciated.
 
Code:
Cartridge          : .280 Ack Imp
Bullet             : .284, 131, Hammer HH
Useable Case Capaci: 66.066 grain H2O = 4.290 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4831 SC *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   97    59.49   2876    2405   43980  10808     90.9    1.243
-09.0   98    60.15   2912    2466   45649  10956     91.6    1.222
-08.0   99    60.81   2948    2528   47385  11101     92.2    1.201
-07.0  100    61.47   2985    2591   49194  11241     92.8    1.181
-06.0  101    62.13   3021    2655   51076  11378     93.4    1.161
-05.0  102    62.80   3058    2719   53038  11511     94.0    1.141
-04.0  103    63.46   3094    2785   55083  11639     94.5    1.122
-03.0  104    64.12   3131    2851   57215  11763     95.1    1.103  ! Near Maximum !
-02.0  105    64.78   3168    2919   59436  11882     95.6    1.084  ! Near Maximum !
-01.0  106    65.44   3204    2987   61757  11995     96.0    1.066  ! Near Maximum !
+00.0  107    66.10   3241    3056   64178  12104     96.5    1.048  ! Near Maximum !
+01.0  108    66.76   3278    3126   66709  12208     96.9    1.031  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    67.42   3315    3197   69354  12305     97.3    1.013  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    68.08   3352    3269   72120  12397     97.7    0.996  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    68.74   3389    3341   75013  12483     98.0    0.979  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    69.41   3426    3415   78042  12563     98.3    0.963  !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    66.10   3332    3229   70834  12171     98.6    1.006  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    107    66.10   3138    2864   57886  11883     93.3    1.097  ! Near Maximum !
 
Code:
Cartridge          : .280 Ack Imp
Bullet             : .284, 169, Hammer HH
Useable Case Capaci: 62.043 grain H2O = 4.028 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4831 SC *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    53.82   2579    2496   44716  10503     94.7    1.378
-09.0   94    54.42   2609    2555   46340  10628     95.2    1.356
-08.0   95    55.02   2640    2615   48025  10750     95.7    1.334
-07.0   96    55.61   2670    2676   49773  10867     96.1    1.312
-06.0   97    56.21   2701    2737   51589  10981     96.6    1.291
-05.0   98    56.81   2731    2799   53475  11090     97.0    1.271
-04.0   99    57.41   2762    2862   55433  11195     97.3    1.250  ! Near Maximum !
-03.0  100    58.01   2792    2925   57469  11296     97.7    1.230  ! Near Maximum !
-02.0  101    58.60   2823    2990   59580  11392     98.0    1.211  ! Near Maximum !
-01.0  102    59.20   2853    3054   61767  11483     98.3    1.191  ! Near Maximum !
+00.0  103    59.80   2883    3120   64039  11569     98.6    1.173  ! Near Maximum !
+01.0  104    60.40   2914    3186   66400  11650     98.9    1.154  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    61.00   2944    3252   68854  11726     99.1    1.136  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    61.59   2974    3320   71407  11796     99.3    1.118  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    62.19   3005    3387   74064  11861     99.5    1.101  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    62.79   3035    3456   76830  11920     99.6    1.084  !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    103    59.80   2954    3274   70426  11488     99.8    1.128  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    103    59.80   2801    2944   57757  11499     96.3    1.225  ! Near Maximum !
 
That will be a flat liner .

JD338
I about got my Sako 85 Bavarian in 7x64 instead of 25-06 and the lack of heavier bullets in 1:10 turned me away from it… now I primarily shoot light monos, fast in a 280. Oh how opinions change
 
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