I was hoping someone else would weigh in on this one, but since no one has, I will add my two cents.
45 Long Colt will fit in a 45 Auto Rim shell plate, so I guess you can use it, but I think you would be far better off with a desiccated 45 Long Colt Shell Plate.
The rim of a 45 Auto Rim case is much thicker than the rim of a 45 Long Colt case, and the 45 Auto Rim shell plate allows for the extra thickness of the rim. If you use a 45 Auto Rim Shell Plate for 45 Long Colt, when the case is bottomed out on the steel base, the shell plate actually contacts the wall of the case, not the recess above the rim. As you preform the various operations on the Star, the case will continually move up and down in the shell plate. Is that bad?? I don't know, but certainly not optimum.
