Sure.
What do you want to know?

We make them up from pieces. Ie; a 3 piece setup and then a steel "ring" to make them fit together.
A "pusher" with a set length for the bottom and in turn the top is left with an evacuating hole.

Cast slugs, a mold for that, that are slightly oversize and shove them into the swaging mold. Then a small 5 ton workshop press, which is just MASSIVE overkill, but what i´ve got standing around.

I´m certain i´ve got more pics of the swaging dies laying around somewhere...

Truth be told though i honestly fail to see the benefits from it. With a well thought through hex casting mold you can split the two apart on target. Really.
I guess the issue is casting mold in itself cause several of the ones out there are plain junk. Expensive junk.