I got the idea of using the lid from a Lee 2 die set as a " disc catch tray ".
I found a drill bit that was a few thousandth's shy of the dia. of Pat Marlin's
.30 cal. gas check tool.
I willfully drilled the hole was too small, then I took a sanding drum
on my Dremel and enlarged the hole with some trial and error until it was
a tight fit on the top of the tool. Works great !
Now , as I punch out the disc, none of them end up on my bench or the floor.
Ben