I don't have a Judge and don't know anything about them.
However, I want one and have read quite a bit about them.
If I recall, "old" .410 shells made for shotguns didn't fit in the Judge. It seems to me that many years ago some companies started making .410 shells that worked in both shotguns and the Judge. See if you can find a box of .410 shells that specifically state something about working in a revolver. Or, possibly see if you can find something to this effect on the Internet. I don't know if I'm right, but that is what I remember and since no one else chimed in, I figured I'd get it started.
Whatever you come up with, please post back here so the knowledge is not lost!