Plated bullets like Berry's are NOT suitable for full-power loads because the plating is so thin. They don't work well with heavy roll crimps, either, but that's not a concern with the 45 ACP.
I'd recommend Accurate #5 because it was developed for the 45 ACP and is a ball powder. Next would be Hodgdon Universal, which matches Unique in burn rate, but measures much better and burns cleaner. Either will fill more of the case than TiteGroup, Clays, Bullseye or other suitable powders.
For data, plated bullets are kind of between cast and jacketed bullets. You can safely compare loads for both and split the difference, especially at less than full power.
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