Quickload pressure prediction using Barnes 225gr Barnes TTSX .338

W

Why not?

CGN Ultra frequent flyer
Rating - 99.8%
585   1   1
Location
Whitehorse, Yukon
I see several references to using this bullet in the 338 Winchester with 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
 
Thanks, my friend. That is what it is going to be used for, a bison hunt. Can't even remember where I got the bullets from, but have exactly twenty.

Will let you and Mark both know how they work with the TTSX, a bullet I have never used before.

Ted
 
The 225gr TTSX is 1.547" long, compared to 1.3" for a Partition. I think it would be a very heavily compressed load with RL19 charges above 72 grains, unless that lot # of brass is quite thin and internal capacity is higher than normal. If that's the case, 76 grains might be possible

Speeds from a 24" of 2800 fps should be attainable
 
Just got back from the range, clear sky, very bright and sunny, -12C wind about 20K from right. Here's 72 gr with a Fed 215 primer, target at 100 yards.

First two shots five inches high, four left, about one inch apart. Adjusted two down and five right, and took one shot. Not too bad for a forty year old Leupold 4X. Ready to try for a Bison soon!

QClnYTTm.jpg

(And, of course this site photo hosting doesn't accept portrait orientation for photos. Wish that could get fixed? Will change to different host to get that right and save some bandwidth with smaller picture too. Be right back.)

Picture is right now. :)

Okay, Mark, the powder was just lightly compressed. Can you tell me what Quickload predicts for the velocity?

Thanks,
Ted
 
Last edited:
Why not? said:
I see several references to using this bullet in the 338 Winchester with 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
Click to expand...

Hi Ted.

Quickload says your proposed load is incredibly unsafe. Even your current 72 gr load is way overpressure.

.338 Win Mag with COAL 3.340"
case length 2.500"
24" barrel length
Barnes 225 gr TSX
75.0 gr RL-19 is 116% of case volume.
Pressure is 77517 PSI, way, way above max.

72.0 gr RL-19 is 111.7% of case capacity at normal COAL of 3.340"
Pressure is 66566 PSI
 
Thanks for the heads-up, prairieguy. Appreciate that. It wasn't my load, but found it on two different sites.

I loaded up 72 gr and went to the range as posted above. Can you tell me what that load is doing?

OAL is 3.390 inches.

VmURSCwm.jpg


Nicely snuggles into the Ruger 77 magazine, and chambers slick as can be.

Ted
 
Last edited:
When I still used the 225 TSX in the .338 Win it was with 69 grains of IMR 4350. If I remember right that isnt even max in most books, but velocity was 2900 fos and accuracy was fine so I never worried about it much. I got my first grizzly, a moose and some other stuff with it but wasn’t very impressed. On the other hand, for bison or buffalo it would be close to the top of the list.
 
There is load data 78 gr r19 with 225 lead core billets 2953 FPS
You can not load Barnes or any solid copper bullet with lead core data . You have a much longer bullet it takes up more case capacity . Less speculation / guessing what a load will do and following manufacture published load data is a much better approach.
 
Why not? said:
Thanks for the heads-up, prairieguy. Appreciate that. It wasn't my load, but found it on two different sites.

I loaded up 72 gr and went to the range as posted above. Can you tell me what that load is doing?

OAL is 3.390 inches.

Ted
Click to expand...

Here's what quickload says about your current load:

Barnes TSX 225gr
COAL 3.390
Muzzle velocity approx 2850 FPS
72.0gr RL-19 s 109.9% case capacity
Max pressure is 63,980 PSI , still well above safe limits.

According to Quickload max pressure for .338 Win Mag is 62,500 PSI.

At your OAL of 3.390 you don't drop below that threshold until you reduce the load of RL-19 to 71.4 gr which gives you 62,127 PSI. With this powder charge QL says your MV will be approx 2830

15% below max pressure (52,950 PSI) is achieved at 68.1gr RL-19. MV with this powder charge is approx 2700.
 
CIP says 4300 BAR which = 62,366 PSI. I guess SAAMI does have better lawyers.

It makes sense that since that QL is written by a German that he's using CIP aka European standard pressure data.
 
You must log in or register to reply here.
Back
Top Bottom