6BRX Case forming

[Terry Altom]

How do you go about determining the amount of crush fit?

Thank a bunch everyone!! Deeply appreciate it!

Take what your chamber is supposed to be and form one about .030" more. You'll basically setup the hydro die, form one, measure it and adjust for the desired length. Then, once you get one that is long, try to chamber it, which it shouldn't. Then, move the shoulder down .010" with your sizing die, try to chamber again. Then size it down again .010" and try to chamber, shouldn't. Then, reduce the shoulder by .005" until you get one that will either chamber easily or chamber with light pressure on the bolt when closing.

If you're serious, I'll be selling my Whidden hydro die soon since I'm switching to another cartridge.

If you have any more questions, feel free to give me a shout. You'll have to sacrifice a case or two to get the feel of it and the measurements, but after that you're good to go. Don't get too hung up on people saying hydro isn't a perfect. Of course it's not and no brass is a perfect until it's been fired in your chamber a couple of times. But, properly hydro formed brass will let you use your normal Dasher load with nearly your normal Dasher ballistics for your first firing. Mine stayed under .3 MOA on the first firing.

Thanks,
Terry

 

[B_Thomas]

Take what your chamber is supposed to be and form one about .030" more. You'll basically setup the hydro die, form one, measure it and adjust for the desired length. Then, once you get one that is long, try to chamber it, which it shouldn't. Then, move the shoulder down .010" with your sizing die, try to chamber again. Then size it down again .010" and try to chamber, shouldn't. Then, reduce the shoulder by .005" until you get one that will either chamber easily or chamber with light pressure on the bolt when closing.

If you're serious, I'll be selling my Whidden hydro die soon since I'm switching to another cartridge.

If you have any more questions, feel free to give me a shout. You'll have to sacrifice a case or two to get the feel of it and the measurements, but after that you're good to go. Don't get too hung up on people saying hydro isn't a perfect. Of course it's not and no brass is a perfect until it's been fired in your chamber a couple of times. But, properly hydro formed brass will let you use your normal Dasher load with nearly your normal Dasher ballistics for your first firing. Mine stayed under .3 MOA on the first firing.

Thanks,
Terry

IS your Whidden hydro die Dasher or 6BRX? Thanks.

 

[Terry Altom]

IS your Whidden hydro die Dasher or 6BRX? Thanks.

Yes it's a Dasher...sorry I went on auto pilot

I definitely recommend the Whidden, though.

 

[Ga. Dawg]

Hydro form or Fire form?

Without a doubt, let DJ hydro form them for you.

 

[DJSBRS]

My findings to making the best hydro-formed brass that will make your hydro-formed brass with one consistent impact at 55,000 PSI. I use hydraulic fluid as well. The final process will match the appropriate go gauge and ready for full load and ready to shoot.

The several impacts method (mallet) at various pressures, stretch your brass differently upon each impact and in my opinion, not a consistent expanded stretch on every case.

DJ
DJ's Brass Service
205-461-4680

Unfired Hydro-formed Dasher below

 

[B_Thomas]

My findings to making the best hydro-formed brass that will make your hydro-formed brass with one consistent impact at 55,000 PSI. I use hydraulic fluid as well. The final process will match the appropriate go gauge and ready for full load and ready to shoot.

The several impacts method (mallet) at various pressures, stretch your brass differently upon each impact and in my opinion, not a consistent expanded stretch on every case.

DJ
DJ's Brass Service
205-461-4680

Hydro-formed Dasher below
View attachment 1020299

Looks great!

 

[Terry Altom]

Yes it's a Dasher...sorry I went on auto pilot

I definitely recommend the Whidden, though.

Here's a picture of my cases. Forming BRX should be about the same.

From left to right:

1. 6BR neck turned
2. Hydro formed (maybe just a touch too far, only need .010" over)
3. Hydro formed case after shoulder bumped back in sizing die to leave a slight crush so there's no need to jam the bullet
4. Dasher case after first firing

 

[B_Thomas]

Here's a picture of my cases. Forming BRX should be about the same.

From left to right:

1. 6BR neck turned
2. Hydro formed (maybe just a touch too far, only need .010" over)
3. Hydro formed case after shoulder bumped back in sizing die to leave a slight crush so there's no need to jam the bullet
4. Dasher case after first firing


View attachment 1020372

Outstanding! You got it figured out!

 

[fm1947]

If I had it to do over I would have hydro them to DJs

 

[Loggins J]

Both work well. Properly hydro-formed will save wear and tear on a dedicated barrel and the cost of components and time to and from the range to shoot.

DJ
DJ's Brass service

I just send DJ a few fired pieces and ship my new brass and get him to form it for me its a lot easier and you won't be disappointed

 

[Webster]

Hydro form or Fire form?

Don't know anything about hydro forming but I don't see how it could expand a case better than 50,000 PSI.
I have a new 6BRX shot 1/4" groups when fire forming at 50 yards. Next week no room to park at 100 yrds so I went to 50 yrds for a ladder test and room to set up the chrony. Ladder groups under 1/4" and round, no vertical. Shot 58 VMax and 70 Sierra BK. This was with a 6.5 lb. trigger and bad trigger control.