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 Post subject: 210gr accubond using 4831sc
PostPosted: Thu Sep 01, 2016 3:00 pm 
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Joined: Wed Aug 31, 2016 2:37 pm
Posts: 1
I'm trying to confirm a load I want to try and need some input. I have a custom 300 win mag, and want to try some long range shooting 600+. My thought is to use the new 210gr and 70.5gr of the 4831sc, I don't have a crono yet, and calculated the speed at 2766-fps.

Has anyone tried this set up, or can you save me some time and point me in the right direction.

1:10 twist Krieger heavy barrel
good brass
good trigger
real deal gun, so lets get that out of the way


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 Post subject: Re: 210gr accubond using 4831sc
PostPosted: Thu Sep 01, 2016 3:29 pm 

Joined: Wed Nov 08, 2006 2:49 pm
Posts: 32179
Location: Northern British Columbia
Welcome aboard.

Don't have the answer to your question. I can, however, give you a QL projection that may suggest the vicinity in which you are working. From a 24 inch rifle with SAAMI parameters, the projection looks like this:

Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 210, Nosler AccuBond LR 58317 G7
Useable Case Capaci: 77.259 grain H2O = 5.016 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC

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 !

Code:
Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-20.0   78    56.40   2239    2337   32219   9350     90.7    1.661
-18.0   80    57.81   2294    2454   34379   9647     91.9    1.616
-16.0   82    59.22   2349    2574   36687   9935     93.0    1.573
-14.0   84    60.63   2405    2697   39150  10214     94.1    1.525
-12.0   86    62.04   2461    2823   41782  10481     95.0    1.479
-10.0   88    63.45   2516    2952   44594  10737     95.9    1.434
-08.0   90    64.86   2572    3084   47595  10979     96.7    1.391
-06.0   92    66.27   2627    3219   50777  11207     97.4    1.350
-04.0   94    67.68   2683    3357   54168  11420     98.1    1.310
-02.0   96    69.09   2738    3497   57795  11616     98.6    1.271  ! Near Maximum !
+00.0   98    70.50   2794    3640   61675  11795     99.1    1.234  ! Near Maximum !
+02.0  100    71.91   2849    3785   65831  11955     99.4    1.198  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    73.32   2904    3932   70287  12096     99.7    1.164  !DANGEROUS LOAD-DO NOT USE!
+06.0  104    74.73   2959    4082   75071  12216     99.9    1.130  !DANGEROUS LOAD-DO NOT USE!
+08.0  106    76.14   3013    4234   80213  12315    100.0    1.098  !DANGEROUS LOAD-DO NOT USE!
+10.0  108    77.55   3068    4388   85748  12394    100.0    1.067  !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 98 70.50 2910 3950 73129 11465 100.0 1.149 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 70.50 2632 3230 50465 11558 94.1 1.346

Great avatar. Looks like some of the "moose" brought into the butcher by city folk.

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