Using h4350(ar2209) in the 243

[mccraggen]

G'day guys, I have a boat load of 2209 for my 243 and want to start pushing a 75 grain vmax super hard, what's everyone's pet loads for this powder in the 243?


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[DrMike]

Can't tell you as we don't have access to all the Aussie powders. However, a QL projection shows this:

Cartridge          : .243 Win.
Bullet             : .243, 75, Hornady V-MAX 22420
Useable Case Capaci: 51.153 grain H2O = 3.321 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : ADI AR 2209

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   83    38.72   2627    1149   29809   9165     81.7    1.337
-18.0   85    39.69   2696    1210   31894   9512     83.4    1.302
-16.0   87    40.66   2765    1273   34125   9854     85.1    1.268
-14.0   89    41.62   2835    1339   36524  10188     86.7    1.234
-12.0   91    42.59   2906    1406   39096  10513     88.2    1.196
-10.0   93    43.56   2977    1476   41860  10828     89.7    1.159
-08.0   95    44.53   3049    1548   44830  11130     91.1    1.122
-06.0   97    45.50   3121    1622   48025  11419     92.4    1.087
-04.0   99    46.46   3193    1698   51467  11692     93.6    1.053  ! Near Maximum !
-02.0  101    47.43   3265    1775   55176  11948     94.7    1.020  ! Near Maximum !
+00.0  103    48.40   3338    1855   59181  12186     95.7    0.989  ! Near Maximum !
+02.0  105    49.37   3410    1937   63509  12403     96.7    0.958  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    50.34   3483    2020   68193  12598     97.5    0.928  !DANGEROUS LOAD-DO NOT USE!
+06.0  109    51.30   3555    2105   73271  12770     98.2    0.900  !DANGEROUS LOAD-DO NOT USE!
+08.0  111    52.27   3628    2192   78783  12917     98.8    0.872  !DANGEROUS LOAD-DO NOT USE!
+10.0  114    53.24   3700    2280   84784  13037     99.3    0.845  !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    103    48.40   3519    2062   70976  12301     99.6    0.913  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    48.40   3107    1607   48622  11449     87.9    1.084

Hope that helps.

Funnily enough, H4350 doesn't show when I run AR2209.

 

[DrMike]

When I run H4350, this is the projection I get.

Cartridge          : .243 Win.
Bullet             : .243, 75, Hornady V-MAX 22420
Useable Case Capaci: 51.153 grain H2O = 3.321 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4350

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   81    37.36   2638    1159   31199   8911     85.5    1.326
-18.0   83    38.29   2703    1216   33309   9209     87.0    1.292
-16.0   85    39.23   2767    1275   35559   9500     88.4    1.259
-14.0   87    40.16   2832    1336   37960   9783     89.7    1.224
-12.0   89    41.10   2897    1397   40500  10057     90.9    1.188
-10.0   91    42.03   2962    1461   43181  10322     92.1    1.153
-08.0   93    42.96   3026    1525   46034  10575     93.3    1.120
-06.0   95    43.90   3091    1591   49074  10816     94.3    1.087
-04.0   97    44.83   3156    1659   52313  11044     95.3    1.056  ! Near Maximum !
-02.0   99    45.77   3220    1727   55766  11258     96.1    1.026  ! Near Maximum !
+00.0  101    46.70   3285    1797   59449  11456     96.9    0.997  ! Near Maximum !
+02.0  103    47.63   3349    1868   63381  11637     97.7    0.969  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    48.57   3413    1940   67579  11801     98.3    0.942  !DANGEROUS LOAD-DO NOT USE!
+06.0  107    49.50   3476    2013   72067  11947     98.8    0.916  !DANGEROUS LOAD-DO NOT USE!
+08.0  109    50.44   3540    2087   76868  12073     99.2    0.890  !DANGEROUS LOAD-DO NOT USE!
+10.0  111    51.37   3603    2161   82010  12179     99.6    0.866  !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    101    46.70   3439    1970   69845  11452     99.8    0.927  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    101    46.70   3085    1585   49235  10949     90.4    1.087

I would suggest that when the tests were run in Germany, the lots varied sufficiently that burn rates were quite different.

 

[mccraggen]

Oh jeez my book said 47 grains max load, I loaded two test lots one at 45 and one at 46


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[DrMike]

Well, your test book is pressure tested. It is always the more precise. QL is a projection with which you can work. For safety, it is always best to work with book loads.

 

[TackDriver284]

Mike is correct about pressure, always work up your loads to maximum pressure. You may get pressure less than book max or more depending on your chamber and brass volume.

 

[mccraggen]

Well I'm a bit under with 45 so should be fine I'm hoping


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[mccraggen]

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[mccraggen]

That was 45 grain with the vmax from my savage axis, I didn't let the barrel cool at all


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[DrMike]

That is putting them where they belong. Has to be a pleasure for you.

 

[mccraggen]

Yeah it was good, very accurate loading


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[desertcj]

I think that you could do better on velocity with a 75gr bullet, but pretty hard to argue with that accuracy! Connecting kills, not 200fps more velocity...

 

[mccraggen]

Yeah exactly! Plus 2209 is much easier on the barrel


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[desertcj]

Not many of us Americans know what 2209 is. I don't personally don't run 75gr bullets in either of my .243's. I have a good load for 55gr bullets in my Savage 12 vlp and then I jump to 87-90gr in my wife's Mossberg Patriot and finally up to 95-105gr again through my Savage. 243 is a lot more potent than most give it credit for that's for sure, especially with the E-tips and Barnes ttsx type bullets available today...

 

[mccraggen]

Yeah I think 243 is a pretty darn good all rounder


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