That's a fairly mild .45 colt load. I've used 9 grains of Unique and also 9 grains of Herco in my S&W Governor, and my Colt SAA. Also used it in all my Ruger BlackHawks and RedHawks, which are obviously much stronger guns.
My nephew has a Taurus Judge and I have loaded him 250 grain cast bullets with 8 grains of Unique, and he's never had a problem with them that he's mentioned. I would guess that the loads you mention should work fine in your Judge.
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