The Raging Judge Magnum is 73 oz. Should soak up the recoil quite well. It looks like the gun from Roger Rabbit.I'll add that shooting a .454 from a Judge will likely be a life altering experience.
And not one I want to try.
45 Colt is pretty dang robust from an N frame S&W; 454 from a smaller lighter gun just seems like a really bad idea.
I'm flinching just thinking about it.