The attached picture is something my dad was using 60+ years ago. I remember it from when I was a wee lad, but don't remember what it was used for.
I now have what is left of his reloading gear, and this was in one of the boxes. It appears to be home built, 36 dowels in a piece of 1" plywood.
Does anyone have something similar, and what is it's purpose?
Thanks in advance.