QL Request for 280 AI

nhenry

Beginner
Feb 7, 2022
87
98
I have a QuickLOAD request if possible.

280 Ackley with 169 Hammer Hunters and H4350 and H4831 using a 24" 1:8 tw barrel.

I read that Hammers were in an update, if not that's alright.
 

DrMike

Ballistician
Nov 8, 2006
34,815
964
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 H4350 *T

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   80    44.64   2311    2004   33907   8843     94.3    1.582
-18.0   82    45.76   2365    2099   36191   9088     95.3    1.534
-16.0   84    46.87   2419    2196   38609   9322     96.1    1.488
-14.0   86    47.99   2473    2295   41171   9545     96.9    1.444
-12.0   88    49.10   2527    2396   43883   9756     97.6    1.402
-10.0   90    50.22   2580    2498   46757   9954     98.2    1.361
-08.0   92    51.34   2633    2601   49802  10138     98.7    1.323
-06.0   94    52.45   2686    2706   53030  10307     99.2    1.285
-04.0   96    53.57   2738    2812   56453  10462     99.5    1.250  ! Near Maximum !
-02.0   98    54.68   2789    2920   60084  10600     99.8    1.215  ! Near Maximum !
+00.0  100    55.80   2841    3028   63940  10723     99.9    1.183  ! Near Maximum !
+02.0  102    56.92   2892    3138   68035  10828    100.0    1.151  !DANGEROUS LOAD-DO NOT USE!
+04.0  104    58.03   2942    3248   72390  10919    100.0    1.120  !DANGEROUS LOAD-DO NOT USE!
+06.0  106    59.15   2992    3359   77023  11005    100.0    1.091  !DANGEROUS LOAD-DO NOT USE!
+08.0  108    60.26   3041    3471   81958  11089    100.0    1.062  !DANGEROUS LOAD-DO NOT USE!
+10.0  110    61.38   3091    3584   87219  11170    100.0    1.034  !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    100    55.80   2936    3235   74935  10338    100.0    1.107  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    100    55.80   2701    2737   53000  10786     96.9    1.283
 

DrMike

Ballistician
Nov 8, 2006
34,815
964
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 *T

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    47.84   2276    1944   31342   9081     88.6    1.628
-18.0   88    49.04   2336    2048   33652   9387     90.0    1.574
-16.0   90    50.23   2397    2156   36128   9683     91.3    1.522
-14.0   93    51.43   2457    2266   38787   9969     92.5    1.472
-12.0   95    52.62   2518    2380   41645  10242     93.7    1.424
-10.0   97    53.82   2579    2496   44716  10503     94.7    1.378
-08.0   99    55.02   2640    2615   48025  10750     95.7    1.334
-06.0  101    56.21   2701    2737   51589  10981     96.6    1.291
-04.0  103    57.41   2762    2862   55433  11195     97.3    1.250  ! Near Maximum !
-02.0  105    58.60   2823    2990   59580  11392     98.0    1.211  ! Near Maximum !
+00.0  108    59.80   2883    3120   64039  11569     98.6    1.173  ! Near Maximum !
+02.0  110    61.00   2944    3252   68854  11726     99.1    1.136  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    62.19   3005    3387   74064  11861     99.5    1.101  !DANGEROUS LOAD-DO NOT USE!
+06.0  114    63.39   3065    3525   79710  11974     99.8    1.067  !DANGEROUS LOAD-DO NOT USE!
+08.0  116    64.58   3125    3665   85841  12062     99.9    1.034  !DANGEROUS LOAD-DO NOT USE!
+10.0  118    65.78   3185    3807   92513  12126    100.0    1.002  !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    108    59.80   3012    3405   76873  11279    100.0    1.088  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    108    59.80   2706    2748   51840  11267     93.0    1.284
 

nhenry

Beginner
Feb 7, 2022
87
98
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 *T

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    47.84   2276    1944   31342   9081     88.6    1.628
-18.0   88    49.04   2336    2048   33652   9387     90.0    1.574
-16.0   90    50.23   2397    2156   36128   9683     91.3    1.522
-14.0   93    51.43   2457    2266   38787   9969     92.5    1.472
-12.0   95    52.62   2518    2380   41645  10242     93.7    1.424
-10.0   97    53.82   2579    2496   44716  10503     94.7    1.378
-08.0   99    55.02   2640    2615   48025  10750     95.7    1.334
-06.0  101    56.21   2701    2737   51589  10981     96.6    1.291
-04.0  103    57.41   2762    2862   55433  11195     97.3    1.250  ! Near Maximum !
-02.0  105    58.60   2823    2990   59580  11392     98.0    1.211  ! Near Maximum !
+00.0  108    59.80   2883    3120   64039  11569     98.6    1.173  ! Near Maximum !
+02.0  110    61.00   2944    3252   68854  11726     99.1    1.136  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    62.19   3005    3387   74064  11861     99.5    1.101  !DANGEROUS LOAD-DO NOT USE!
+06.0  114    63.39   3065    3525   79710  11974     99.8    1.067  !DANGEROUS LOAD-DO NOT USE!
+08.0  116    64.58   3125    3665   85841  12062     99.9    1.034  !DANGEROUS LOAD-DO NOT USE!
+10.0  118    65.78   3185    3807   92513  12126    100.0    1.002  !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    108    59.80   3012    3405   76873  11279    100.0    1.088  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    108    59.80   2706    2748   51840  11267     93.0    1.284
Thanks a bunch
 

JD338

Range Officer
Staff member
Nov 4, 2004
21,574
654
RL22 is my go to powder in the 280AI. I did find an extremely accurate load for the 168 gr ABLR with IMR7828SSC that went .056" at 100 yards but the velocity was pretty slow. MRP and Hunter might be alternative powders to try if you can get them.

JD338
 

nhenry

Beginner
Feb 7, 2022
87
98
RL22 is my go to powder in the 280AI. I did find an extremely accurate load for the 168 gr ABLR with IMR7828SSC that went .056" at 100 yards but the velocity was pretty slow. MRP and Hunter might be alternative powders to try if you can get them.

JD338
Thanks for the info. I'd have liked to try a load with H1000 and the 169s but I could only find a pound so I skipped on it. I have lots of IMR 4350, a pound of IMR 4831, 3 lbs of H4831, and a pound of H4350. Really wish I had enough primers for all this
 
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