338 Win Mag using H4350

[Jakkals]

Speer #13 manual list a starting load for a 200gr bullet as 71gr. with a max of 75 gr.
Hodgdon list on their website a starting load of 65gr with a max of 72.5 gr.

Can anyone help with this or explain the discrepancy ?

I have used 72 grains of H4350 with a CCI 250 primer the last 10-12 years without any problem. I ran out of my old powder and after buying a new batch of H4350 saw these recommendations on Hodgdon's website.

[stevec223]

me three

ive got 4 or 5 books i always cross-reference with....talk about confused sometimes !!!! i usually go with the book that is using the same brass and primer im going to use.... the manufacture of the bullet and their book is always my first choice though---others are great for checking diff. components im using....its always something to scratch your head about...safety first always though... cheers...

[FLIGHT762]

Different components = different results. The Hornady #8 book shows a starting load of 58.7 grs. of H-4350 to a maximum of 73.9 grs. of H-4350 with their 200 gr. bullet.

Load a few rounds @ 70 grains with the new H-4350 and go up from there if you get no signs of high pressure.

[Whiterabbit]

Speer #13 manual list a starting load for a 200gr bullet as 71gr. with a max of 75 gr.
Hodgdon list on their website a starting load of 65gr with a max of 72.5 gr.

Can anyone help with this or explain the discrepancy ?

I have used 72 grains of H4350 with a CCI 250 primer the last 10-12 years without any problem. I ran out of my old powder and after buying a new batch of H4350 saw these recommendations on Hodgdon's website.

65-71 vs 72-75.

At most that's <10% off, and <5% at max loading. I don't see a discrepancy at all.

Especially when the rule of the day when discussing load data is always the endless yammering of "work up your own loads, see what works best for you, never start at max load, etc etc etc etc etc etc etc etc etc etc etc etc."

3 grains off would make me concerned if we were loading 380 or 5.7. But not a magnum.

[Jakkals]

Thanks for all the info, I appreciate it.

[ar15barrels]

What specific bullet are you using?
Also, what length barrel and what length are you loading your ammo to?
With those figures I can run a quick load simulation...

[Jakkals]

What specific bullet are you using?
Hornady 200 grain Interlock SP (SKU 3310)

Also, what length barrel and what length are you loading your ammo to?
Barrel: 24"
Length: 3.34"

With those figures I can run a quick load simulation...

Thank you very much.

[ar15barrels]

Cartridge          : .338 Win Mag.
Bullet             : .338, 200, Hornady SP 3310
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length      : 24.0 inch or 609.6 mm
Powder             : IMR 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.694% 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

-06.9   96    67.00   2740    3334   45301   9765     96.0    1.260
-06.3   97    67.50   2760    3384   46306   9836     96.3    1.247
-05.6   97    68.00   2781    3433   47358   9906     96.6    1.234
-04.9   98    68.50   2801    3483   48422   9974     96.8    1.222
-04.2   99    69.00   2821    3534   49513  10041     97.1    1.209
-03.5   99    69.50   2841    3585   50626  10106     97.3    1.197
-02.8  100    70.00   2861    3635   51770  10169     97.6    1.185
-02.1  101    70.50   2881    3687   52941  10231     97.8    1.173
-01.4  102    71.00   2901    3738   54138  10290     98.0    1.162  ! Near Maximum !
-00.7  102    71.50   2921    3790   55364  10349     98.2    1.150  ! Near Maximum !
+00.0  103    72.00   2942    3842   56620  10405     98.4    1.139  ! Near Maximum !
+00.7  104    72.50   2962    3895   57901  10459     98.6    1.127  ! Near Maximum !
+01.4  104    73.00   2982    3948   59210  10512     98.7    1.116  ! Near Maximum !
+02.1  105    73.50   3002    4001   60547  10562     98.9    1.105  ! Near Maximum !
+02.8  106    74.00   3021    4054   61913  10611     99.0    1.094  !DANGEROUS LOAD-DO NOT USE!
+03.5  107    74.50   3041    4108   63312  10657     99.2    1.084  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba    103    72.00   2987    3961   59948  10384     99.3    1.112  ! Near Maximum !
Data for burning rate decreased by 3% relative to nominal value:
-Ba    103    72.00   2892    3714   53304  10376     97.1    1.168  ! Near Maximum !

[Jakkals]

Would it be possible to run a load simulation for Hodgdon's 4350 as that is the powder I am using. Thanks for the info on IMR as I will try that too in the future.

I appreciate the time and effort.

[ar15barrels]

Would it be possible to run a load simulation for Hodgdon's 4350 as that is the powder I am using. Thanks for the info on IMR as I will try that too in the future.

I appreciate the time and effort.

Cartridge          : .338 Win Mag.
Bullet             : .338, 200, Hornady SP 3310
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length      : 24.0 inch or 609.6 mm
Powder             : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.685% 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

-06.8   94    68.00   2755    3370   45139   9903     96.8    1.255
-06.2   94    68.50   2775    3420   46162   9972     97.1    1.242
-05.5   95    69.00   2796    3471   47207  10039     97.4    1.229
-04.8   96    69.50   2816    3522   48279  10104     97.6    1.217
-04.1   96    70.00   2836    3573   49375  10167     97.8    1.204
-03.4   97    70.50   2857    3625   50499  10229     98.1    1.192
-02.7   98    71.00   2877    3677   51653  10289     98.3    1.180
-02.1   98    71.50   2898    3729   52832  10346     98.5    1.168
-01.4   99    72.00   2918    3781   54041  10402     98.6    1.156  ! Near Maximum !
-00.7  100    72.50   2938    3834   55281  10455     98.8    1.144  ! Near Maximum !
+00.0  101    73.00   2959    3887   56548  10507     99.0    1.133  ! Near Maximum !
+00.7  101    73.50   2979    3941   57856  10556     99.1    1.121  ! Near Maximum !
+01.4  102    74.00   2999    3995   59190  10604     99.3    1.110  ! Near Maximum !
+02.1  103    74.50   3020    4049   60561  10649     99.4    1.099  ! Near Maximum !
+02.7  103    75.00   3040    4103   61966  10691     99.5    1.088  !DANGEROUS LOAD-DO NOT USE!
+03.4  104    75.50   3060    4158   63405  10732     99.6    1.077  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba    101    73.00   3004    4008   59950  10457     99.7    1.105  ! Near Maximum !
Data for burning rate decreased by 3% relative to nominal value:
-Ba    101    73.00   2908    3756   53271  10501     97.8    1.162  ! Near Maximum !

[Jakkals]

Thank you very much for the load data, also great info on your website www.ar15barrels.com