Quickload request, 280 AI 168 Berger VLD Hunting

[NWBlacktail]

I feel kind of funny asking for Berger data on a Nosler forum, but here goes...

SAAMI 280 AI
Nosler brass
168 grain Berger VLD Hunting
OAL 3.485"
24" barrel, 1:8 twist
RL 26 powder
Fed 215 primers

I would greatly appreciate it! :mrgreen:

 

[DrMike]

Don't feel funny. Ask, and someone will provide data.

Cartridge          : .280 Ack Imp
Bullet             : .284, 168, Berger M VLD G7 #28401
Useable Case Capaci: 66.795 grain H2O = 4.337 cm³
Cartridge O.A.L. L6: 3.485 inch = 88.52 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26

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   79    52.32   2394    2138   31049  11076     96.8    1.632
-18.0   81    53.63   2458    2253   33332  11366     97.8    1.588
-16.0   83    54.94   2521    2371   35798  11629     98.6    1.544
-14.0   85    56.24   2584    2491   38462  11862     99.2    1.498
-12.0   87    57.55   2647    2613   41342  12064     99.7    1.447
-10.0   89    58.86   2709    2738   44459  12232     99.9    1.399
-08.0   91    60.17   2771    2864   47836  12366    100.0    1.352
-06.0   93    61.48   2832    2992   51498  12482    100.0    1.307
-04.0   95    62.78   2892    3120   55436  12593    100.0    1.265  ! Near Maximum !
-02.0   97    64.09   2952    3251   59665  12700    100.0    1.223  ! Near Maximum !
+00.0   99    65.40   3011    3383   64225  12802    100.0    1.184  ! Near Maximum !
+02.0  101    66.71   3070    3516   69146  12899    100.0    1.146  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    68.02   3129    3651   74464  12992    100.0    1.109  !DANGEROUS LOAD-DO NOT USE!
+06.0  105    69.32   3187    3789   80219  13079    100.0    1.074  !DANGEROUS LOAD-DO NOT USE!
+08.0  107    70.63   3245    3928   86458  13161    100.0    1.040  !DANGEROUS LOAD-DO NOT USE!
+10.0  109    71.94   3303    4070   93232  13237    100.0    1.007  !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     99    65.40   3128    3651   80180  12300    100.0    1.086  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     99    65.40   2829    2985   49319  13406     99.3    1.317

 

[NWBlacktail]

Thank you kind sir! I really appreciate you taking the time.

 

[DrMike]

Glad to help. That should be a great load.

 

[Ridgerunner665]

Here's you one with an adjusted burn rate...by all accounts the proper Ba setting for Reloder 26, in a 280 Ackley case, is .372.

Your case capacity would improve the accuracy of the load data a bit also....using Reloder 26, I can hit 2,940 fps with 168's in mine, but its getting pretty warm.

Cartridge          : .280 Ack Imp
Bullet             : .284, 168, Berger Hunt VLD G7 #28501
Useable Case Capaci: 66.806 grain H2O = 4.338 cm³
Cartridge O.A.L. L6: 3.485 inch = 88.52 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.82% 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

-08.2   85    56.00   2718    2756   47291  11436    100.0    1.375
-07.4   85    56.50   2741    2802   48621  11489    100.0    1.357
-06.6   86    57.00   2763    2847   49988  11540    100.0    1.340
-05.7   87    57.50   2785    2893   51390  11592    100.0    1.323
-04.9   88    58.00   2807    2938   52830  11642    100.0    1.306
-04.1   88    58.50   2829    2984   54309  11692    100.0    1.290
-03.3   89    59.00   2850    3031   55827  11742    100.0    1.274  ! Near Maximum !
-02.5   90    59.50   2872    3077   57387  11791    100.0    1.258  ! Near Maximum !
-01.6   91    60.00   2894    3123   58988  11839    100.0    1.243  ! Near Maximum !
-00.8   91    60.50   2915    3170   60633  11887    100.0    1.228  ! Near Maximum !
+00.0   92    61.00   2937    3217   62323  11934    100.0    1.213  ! Near Maximum !
+00.8   93    61.50   2958    3264   64059  11981    100.0    1.198  ! Near Maximum !
+01.6   94    62.00   2979    3311   65842  12027    100.0    1.183  !DANGEROUS LOAD-DO NOT USE!
+02.5   94    62.50   3001    3359   67675  12072    100.0    1.169  !DANGEROUS LOAD-DO NOT USE!
+03.3   95    63.00   3022    3407   69559  12116    100.0    1.155  !DANGEROUS LOAD-DO NOT USE!
+04.1   96    63.50   3043    3455   71495  12160    100.0    1.141  !DANGEROUS LOAD-DO NOT USE!

 

[NWBlacktail]

Thanks RR!

I enjoy reading about your M48, and load testing. Sounds like the 160 AB has been working out very well for you. That looks like a pretty stout bullet.

 

[NWBlacktail]

Here's you one with an adjusted burn rate...by all accounts the proper Ba setting for Reloder 26, in a 280 Ackley case, is .372.

Your case capacity would improve the accuracy of the load data a bit also....using Reloder 26, I can hit 2,940 fps with 168's in mine, but its getting pretty warm.

Pretty close! I did my barrel break-in today, and picked 59 grain. I did a string of 5 on the chrono and (without doing the math) got about 2840 fps at 35 deg F. :mrgreen:

I'll do my seating depth testing next, then I'll adjust the charge to find the accuracy sweet spot.

thanks again!

 

[nvbroncrider]

Don't forget about 7828 it's been great in mine.

 

[MAinAR]

RR is correct on RL26 burn rate, it is faster burning than shown on charts and in most load data. At 2,900 using the exact load the OP posted it is starting to get warm on pressure.

 

[NWBlacktail]

Thanks guys!

I do have a # of IMR 7828ssc for testing purposes. I'll give it a try some time. But I have 10#'s of RL26, so I'm really hoping I can find something that will work with that.

I'm also hearing you guys. Sounds like the pressure threshold is 2900 fps or slightly over. I would be happy with that speed, no need to push it too hard.

 

[JD338]

IMR7828 gave me exceptional accuracy but was a little slower speed than I was hoping for.


JD338