Quickload pressure prediction using Barnes 225gr Barnes .338 TTSX

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Quickload pressure prediction using Barnes 225gr Barnes .338 TTSX #15679565 01/19/21
Joined: Feb 2001 Posts: 4,086 Yukon Territory, Canada Yukoner OP Campfire Tracker
OP Yukoner Campfire Tracker Joined: Feb 2001 Posts: 4,086 Yukon Territory, Canada	I see several references to using this bullet in the 338 Winchester Mag with as much as 78gr of Re19 and magnum primers delivering over 2800 fps. First of all, anyone using Re19 in their 338 Win Mag? Secondly, what should we expect with a 75gr load? Thanks, Ted

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Re: Quickload pressure prediction using Barnes 225gr Barnes .338 TTSX

Yukoner #15679837 01/19/21

Joined: Nov 2011

Posts: 31,104

Likes: 5

Colorado

antelope_sniper Online Content

Campfire 'Bwana

antelope_sniper

Campfire 'Bwana

Joined: Nov 2011

Posts: 31,104

Likes: 5

Colorado

Ted,
78 grains would be a very bad idea. So would 75. I don't think you could get 78 grains in the case with that 225gr bullet.

I don't know who you've been listening to, or what they were smoking, but it's time to stop paying attention to anything they have to say:

Code

Cartridge          : .338 Win Mag.
Bullet             : .338, 225, Barnes 'TTSX' S 30430
Useable Case Capaci: 69.939 grain H2O = 4.541 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-19 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.714% 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

-07.1  101    65.00   2638    3476   47209   8370     95.2    1.369
-06.4  102    65.50   2658    3531   48363   8435     95.5    1.354
-05.7  102    66.00   2679    3586   49546   8498     95.8    1.339
-05.0  103    66.50   2700    3642   50762   8559     96.1    1.325
-04.3  104    67.00   2721    3698   52010   8619     96.4    1.311
-03.6  105    67.50   2741    3754   53294   8677     96.7    1.296  ! Near Maximum !
-02.9  105    68.00   2762    3811   54611   8734     96.9    1.283  ! Near Maximum !
-02.1  106    68.50   2783    3869   55963   8789     97.2    1.269  ! Near Maximum !
-01.4  107    69.00   2803    3927   57355   8843     97.4    1.255  ! Near Maximum !
-00.7  108    69.50   2824    3985   58785   8895     97.7    1.242  ! Near Maximum !
+00.0  109    70.00   2845    4044   60254   8945     97.9    1.228  ! Near Maximum !
+00.7  109    70.50   2866    4103   61766   8993     98.1    1.216  !DANGEROUS LOAD-DO NOT USE!
+01.4  110    71.00   2886    4162   63320   9039     98.3    1.203  !DANGEROUS LOAD-DO NOT USE!
+02.1  111    71.50   2907    4222   64920   9084     98.5    1.190  !DANGEROUS LOAD-DO NOT USE!
+02.9  112    72.00   2928    4283   66565   9126     98.7    1.177  !DANGEROUS LOAD-DO NOT USE!
+03.6  112    72.50   2949    4344   68260   9167     98.9    1.165  !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    109    70.00   2890    4172   63853   8937     99.0    1.200  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba    109    70.00   2796    3906   56789   8910     96.5    1.260  ! Near Maximum !

You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell

Re: Quickload pressure prediction using Barnes 225gr Barnes .338 TTSX Yukoner #15682393 01/20/21
Joined: Feb 2001 Posts: 4,086 Yukon Territory, Canada Yukoner OP Campfire Tracker
OP Yukoner Campfire Tracker Joined: Feb 2001 Posts: 4,086 Yukon Territory, Canada	Saw those loads on two different sites. They sounded really hot. Thanks much for the heads-up! Ted

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