375 Load Enquiry

[eddieb]

Could somebody please help with a Quickload calculation to give me an idea of starting and max loads with below components.

Cartridge .375 H&H Magnum

Bullet 300 Grain Barnes TXFB

Powder Vitavourhi 150

Primer would be CCI Large Rifle Magnum and Winchester Brass.

Currently using RL15 but would like the alternative.

Cheers

 

[eddieb]

Hi

I have done and there is a load for Swift A Frame at that bullet weight but as Barnes do not list any of the Vit powders in their data i was hoping someone could run it on Quickload.

[srvet]

I’ve just seen this thread, are you sorted now as I will happily run this for you if you still need it 

[eddieb]

Hi

Yes I would still appreciate the info.

Thanks & Regards

[srvet]

Here you go, it is based on the default data off QL so bear that in mind. As always start low and work up, may not be safe in your rifle etc.....

I assumed a 25 inch barrel as on a CZ 550. Dont know what the case capacity of Winchester cases are in comparison to the QL default case capacity.

Hope this helps

 

Cartridge          : .375 H.& H. Mag.
Bullet             : .375, 300, Barnes 'TSX' 30491
Useable Case Capaci: 74.300 grain H2O = 4.824 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length      : 25.0 inch = 635.0 mm
Powder             : Vihtavuori N150 *C

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    51.70   1986    2627   29553   5630     96.9    1.699
-18.0   82    52.99   2029    2743   31294   5768     97.6    1.661
-16.0   84    54.28   2073    2861   33124   5899     98.2    1.623
-14.0   86    55.57   2116    2982   35062   6023     98.7    1.586
-12.0   88    56.87   2159    3104   37120   6140     99.1    1.551
-10.0   90    58.16   2201    3228   39306   6248     99.4    1.516
-08.0   92    59.45   2244    3353   41626   6348     99.7    1.483
-06.0   94    60.74   2286    3480   44091   6438     99.9    1.450
-04.0   96    62.04   2328    3609   46708   6520    100.0    1.418
-02.0   98    63.33   2369    3738   49490   6592    100.0    1.387
+00.0  100    64.62   2410    3869   52448   6660    100.0    1.356
+02.0  102    65.91   2451    4001   55594   6727    100.0    1.321  ! Near Maximum !
+04.0  104    67.20   2491    4134   58943   6791    100.0    1.288  ! Near Maximum !
+06.0  106    68.50   2531    4269   62511   6854    100.0    1.256  !DANGEROUS LOAD-DO NOT USE!
+08.0  108    69.79   2571    4404   66316   6915    100.0    1.225  !DANGEROUS LOAD-DO NOT USE!
+10.0  110    71.08   2611    4542   70378   6973    100.0    1.195  !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    64.62   2486    4118   61924   6411    100.0    1.271  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    100    64.62   2294    3507   43205   6839     98.3    1.450

[eddieb]

Hi Srvet

Thanks for the info. My rifle has a 24" barrel its a Winchester Safari Express. According to the Barnes load data my load using Reloader 15 seems to be giving better speeds from a load that is several grains away from max.

Up to now I have only tried the rifle in practice and on paper. SA trip is off this year and given the right circumstances I may use it to cull the odd deer locally.

Obliged

 

[srvet]

You are most welcome, I am contemplating a similar trip myself . Good luck when it happens 

[srvet]

On 5/28/2020 at 12:10 PM, eddieb said:

Hi Srvet

Thanks for the info. My rifle has a 24" barrel its a Winchester Safari Express. According to the Barnes load data my load using Reloader 15 seems to be giving better speeds from a load that is several grains away from max.

Up to now I have only tried the rifle in practice and on paper. SA trip is off this year and given the right circumstances I may use it to cull the odd deer locally.

Obliged

 

Did you get any further with this? I loaded my 375 with the 300g TSX /RS60 and got up to 2611fps when I hit the first pressure signs. Haven’t had chance to group test it yet but looks promising!

[eddieb]

Hi

No i haven`t taken it any further. What with the Covid restrictions etc. Still not sure about a trip next year. I had a flight booked with SAA for this year and have had no feedback whatsoever from them regarding refund or anything really.

Will get back to this when travel restrictions and weather more suitable perhaps we can exchange info further.

Thanks Simon and give Andy my regards.