I recently purchased this case forming die from RCBS and I'm not sure I trust it. I thought I'd run this by the crew for opinions.

OK, RCBS claims you can reform (neck up) .30-06 brass to use in a 8X64S Brenneke chamber by simply running the brass through their case forming die and then full length resizing it in a 8X64S reloading die. I did but the shoulder is in the wrong place. The shoulder on the re-formed .30-06 brass is 0.076 lower than on a factory Bertrem 8X64S case.

Now, what make it possible is the shoulder DIA. is wider on the reformed .30-06 cases but not by a huge amount. I'm guessing they assume the case will headspace the for the 1st firing on the side of the case wall. This is all foreign to me though. I'm not saying it wouldn't work but it just seems a little scary to me.

What do you guy's think?

Here is what RCBS say's about it. These are the only instructions provided.


Here is what it looks like after the reizing process. The case on the left is the re-formed .30-06 case. The RED LINES indicate where the the original 8X64 case achieves the the same DIA as the re-formed case does at the shoulder.



I smoked one of the new cases and chambered it. You can see where does make contact on most of the area on the sides below the shoulder but you can't feel any resistance closing the bolt. It just looks like a headspace problem to me. ANY COMMENTS OR SUGGESTIONS ARE WELCOME.

Terry

Here is another without any drawing on it.



Terry

I`d run a 338 or 35 cal expander ball through the neck and resize leaving a false shoulder for headspace.
That`s just my opinion though and I`ve no experiance with either the cartridge you are trying to form or any problem like you are experiancing. I would however want a solid headspace contact between my case and the chamber.

quote:

Originally posted by Ol` Joe:
I`d run a 338 or 35 cal expander ball through the neck and resize leaving a false shoulder for headspace.

I think that would do it.

Thank you!

Well, I ran another one up a .338-06 die and then ran it up the 8X64S Brenneke die. Now I'm getting a "crush fit". I think your suggestion will work perfectly.

Here is a case I smoked and then chambered. The mouth will hold an 8mm bullet and the neck most certainly holds the round in place creating the false shoulder you mentioned.

This will work I think.

Thanks again,
Terry