The link I originally posted to the semi-sabot load that uses a 0.358" wad cutter inside a cut down 410 shot wad as a sabot works fairly well out of a 410-bore long gun. From your original post it sounded like you have long guns in 410 as well as your Judge. I will say, though, that I'm not too keen on the powder load they suggest for that combination. Red Dot is a pretty fast powder to use in the 410 even for slug loads. About 15 grains of 2400 powder will give better velocity and less pressure and won't wear out hulls as fast when loaded in the exact same combination suggested in the link for that slug load. Or at least it did for me --- your mileage may vary and you copy that load or my modification to it at your own risk.
You should go check out McBirch
's web site --- especially the section on his tests with the Judge.http://mcb-homis.com/http://mcb-homis.com/judge/index.htm
Now if I'm correct in my suspicion that you have 410-bore long guns that you want to reload slug and buck for as well then there are some other sections on his page that your going to want to check out as well.
and myself are the two main "tinkers" on the web right now who fiddle with reloading 410-slugs. He does better analytical testing then I do and does better write-ups then I do and sooner or later anything I come up with as far as 410 slug designs gets sent to him. So long story short bookmark his web site and check it for updates every month or so if you want to stay up to date on the most relevant info on 410 slugs including reloading them. If you run some searches on my user name on the cast boolits forum you can also find some interesting but rather long and sometimes rambling threads on some of my experimental 410 slug designs. Be warned, though, they are exactly that --- Experimental. And not all experiments turn out as planned.