300 Weatherby 165 or 168gr TSX H4831 load data request

[ACLakey]

I have a buddy with a 300 Weatherby and a load for H4831SC and 165gr TSX bullets that seems HOT. He asked me to load some for him but was wondering if anybody can run a quickload check for me? Anybody have any pet loads for that combination? I am likely going to do a OCW workup but can't find any data.

 

[Dwh7271]

Cartridge : .300 Weath. Mag.
Bullet : .308, 165, Barnes 'TSX'BT 30843
Useable Case Capaci: 88.633 grain H2O = 5.755 cm³
Cartridge O.A.L. L6: 3.560 inch = 90.42 mm
Barrel Length : 26.0 inch = 660.4 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 !

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

-20.0 80 66.08 2607 2490 33360 9529 89.2 1.526
-18.0 82 67.73 2672 2615 35609 9836 90.5 1.485
-16.0 84 69.38 2736 2743 38015 10135 91.7 1.446
-14.0 86 71.04 2802 2876 40593 10424 92.9 1.408
-12.0 88 72.69 2867 3011 43352 10702 93.9 1.371
-10.0 90 74.34 2932 3150 46312 10967 94.9 1.330
-08.0 92 75.99 2998 3292 49486 11219 95.9 1.290
-06.0 94 77.64 3063 3438 52882 11456 96.7 1.251
-04.0 96 79.30 3129 3586 56495 11676 97.4 1.214 ! Near Maximum !
-02.0 98 80.95 3194 3738 60364 11879 98.1 1.177 ! Near Maximum !
+00.0 100 82.60 3260 3893 64518 12063 98.7 1.142 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 84.25 3325 4050 68985 12227 99.1 1.108 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 85.90 3390 4210 73792 12370 99.5 1.076 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 87.56 3455 4373 78974 12491 99.8 1.044 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 89.21 3520 4539 84567 12588 99.9 1.014 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 90.86 3584 4706 90615 12661 100.0 0.984 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 100 82.60 3337 4079 70443 11993 99.8 1.100 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 100 82.60 3170 3681 58619 11980 96.5 1.191 ! Near Maximum !

 

[FOTIS]

7828 buddy!

 

[DrMike]

The Barnes Manual lists 85.5 grains of H4831SC as a maximum charge with a maximum velocity of 3267 fps from a 24 inch barrel.

 

[Dwh7271]

Discrepancy in Quickload due to freebore you think?

 

[ACLakey]

FOTIS....yeah..Everything I read comes back to 7828 He dropped off three pounds of H4831SC with the rifle though.

DR. Mike...thanks for the information

Dwh7271...thank you for the data

 

[FOTIS]

Discrepancy in Quickload due to freebore you think?

for sure! Q/L lists 200 gr 3150 fps max in a 30-378 I get close to 3300

 

[Dwh7271]

Thanks Fotis!

 

[Ridgerunner665]

Discrepancy in Quickload due to freebore you think?

for sure! Q/L lists 200 gr 3150 fps max in a 30-378 I get close to 3300

Try adding .361" (the freebore length according to SAAMI) to the OAL, and change the weighting factor to .4, and see if that is anywhere close to your actual data...no need to change the shot start pressure, since you're not actually shooting jammed bullets...but that should get it closer to making predictions based on the actual usable combustion chamber...with a little experimenting, I'm certain it could be mapped out and matched enough to be useful and pretty accurate.

May not be something a person would want to mess with on a new (unfamiliar) rifle, but once you get to know it (some chrono data, find max loads, etc.)...it might be useful.


EDIT: If you seat the bullets longer than 3.655"...subtract however much past 3.655" you are from the .361"...then add that to your actual OAL in the program....if you seat shorter, add instead of subtract from .361".

 

[Ridgerunner665]

DO NOT USE THIS DATA for anything other than comparison purposes...it is based on an edited OAL/ usable capacity (see post above)...that said, it does match the Barnes data above quite nicely (different barrel lengths used)

Cartridge          : .300 Weath. Mag.
Bullet             : .308, 165, Barnes 'TSX'BT 30843
Useable Case Capaci: 94.856 grain H2O = 6.159 cm³
Cartridge O.A.L. L6: 3.891 inch = 98.83 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Hodgdon H4831 SC

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.616% 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

-06.2   91    80.23   3074    3463   49338  12416     95.7    1.266
-05.5   91    80.76   3095    3509   50310  12501     96.0    1.254
-04.9   92    81.28   3115    3556   51300  12584     96.2    1.243
-04.3   93    81.81   3136    3602   52307  12666     96.5    1.232
-03.7   93    82.34   3156    3650   53335  12746     96.7    1.220
-03.1   94    82.87   3177    3697   54384  12825     97.0    1.209  ! Near Maximum !
-02.5   94    83.39   3197    3745   55455  12903     97.2    1.198  ! Near Maximum !
-01.8   95    83.92   3218    3793   56548  12979     97.4    1.187  ! Near Maximum !
-01.2   96    84.45   3238    3842   57664  13053     97.6    1.176  ! Near Maximum !
-00.6   96    84.97   3259    3891   58803  13125     97.8    1.166  ! Near Maximum !
+00.0   97    85.50   3279    3940   59967  13195     98.0    1.155  ! Near Maximum !
+00.6   97    86.03   3300    3989   61154  13264     98.2    1.144  ! Near Maximum !
+01.2   98    86.55   3320    4039   62367  13331     98.3    1.134  ! Near Maximum !
+01.8   99    87.08   3341    4089   63606  13397     98.5    1.124  !DANGEROUS LOAD-DO NOT USE!
+02.5   99    87.61   3361    4139   64871  13460     98.7    1.114  !DANGEROUS LOAD-DO NOT USE!
+03.1  100    88.13   3382    4189   66163  13521     98.8    1.104  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     97    85.50   3361    4139   65418  13191     99.5    1.111  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     97    85.50   3185    3716   54541  13036     95.5    1.205  ! Near Maximum !

 

[Dwh7271]

RR,
That's good thinking and info.
Thank you.

 

[Ridgerunner665]

Thanks...

I firmly believe QuickLoad can be manipulated to match ANYTHING...just have to CAREFULLY tinker with it some....and have good chrono data to compare it to.

 

[ACLakey]

Thanks for the data, I found an older Barnes reloading book and they list a max load at 85.5gr.