Thanx fellas, looks like it is gonna be safe. I will work up to it. Hope it shoots.

I was hoping I can get someone to run this for me. Interested in predicted pressures/velocity.

378 WBY MAG

26" barrel

270 XLC and/or 270 TRIPLE SHOX

115 gr of RL 25

Fed 215 Match primer

COAL is 3.675"



Thanx in advance!

POP,
270 xlc shows 3067 fps and 61,339 psi.
270 gr. X shows 3082 fps and 61,644 psi.
Jim

POP,

I don't have QuickLoad, but for the for the "X" bullet I came up:

3025 fps +/- 22 fps @ 59,500 psi +/- 1500 psi.

Sorry but I have not modelled the "XLC".

ASS_CLOWN

when I've tried running Wby loads through quickload, then they are always showing higher pressures than would be indicated by the reloading manulas. How do you account for the long Wby throat?

The long Weatherby throat reduces pressure and velocity. I posted a high side pressure prediction. The low side ranged around 57,000 psi. The velocity only dropped about 10 fps, though.

Again this is simulated data, so your mileage may vary.

By the way, Alliant shows a load of 115 Rel 22 with the 270 Hornady with a pressure of around 55 ksi. I would expect the Barnes to still be higher pressured than this with the Rel 25. Barnes bullets are radially stiff and gall badly (aka copper foul), at least that is what we have found in our bullet push through tests.

ASS_CLOWN

I worked up to 115 gr of RL 22 and 270 Horny. I easily busted 3200 fps and a little ejector mark here and there!

About 113 is right about max....3150 fps...

POP,

You might want to have someone run your Rel 22 load with the Hornady through Quickload to give you a reality check on the simulation.

When I run Alliants load of 115 grains of Rel 22 and the 270 grain Hornady soft point through my software , I come up with:

3071 fps for a muzzle velocity (270 grain Hornady)
Chamber pressure of 53.8 ksi +/- 1700 psi.

In other words, it is close to what the Alliant data says.

So I don't recall who replied with the Quickload data, but perhaps they should run this LOAD of 115 grains of Rel 22 and the Hornady 270 gr SP. Then compare to the Alliant data and your rifle's performance. In this way, you can determine if the data we have given you is SAFE.

On a less technical note. If you got extractor marks with 115 grains of Rel 22 and a 270 grain Hornady SP, I would start with about 110 grains of Rel 25 with the Barnes.

There isn't that big of a difference in energy (aka burn rate) between the Rel22 and Rel25. There is a big difference between the Hornady and Barnes bullets though, and I am concerned that the bullet difference is BIGGER than the powder difference.

Just my .02 worth of free advise.

ASS_CLOWN

I agree. This is why I said I would work up to 115 of RL25. After all it is only 1% slower than RL 22. Thanx

POP,

You did say that, I missed it. Sorry for sounding like such a jerk.

ASS_CLOWN