Hello

First off I am a complete novice when it comes to swaging. What I am trying to do is swag my primer pockets of 7.62 X 38mmR brass in order to convert it into berdan brass. I have read up on the process and watch many videos but all of the ones I have viewed are for larger brass such as 7.62 X 39 and 7.62 X 54R brass.

I already reform 32/22 brass and load it and shoot it from my nagant revolver but I would like to try and reuse military brass with boxer primers.

So my question is what thickness of copper would be best for swaging the primer pocket to decrease its diameter. Instead of a copper tubing which I do not think I can get small enough I was thinking about mashing small square sheets of soft copper with a RCBS primer pocket swager. I realize I will need to re-drill the flash hole as the copper will most likely fill the bottom of the primer pocket.

Any ideas would be appreciated.