You could load some powder puff loads up in .38 special with AA2 powder. It is way too fast for .357 mag. You probably could get by using AA5 for both loads but the mag load will never quite get where it should be. I like using AA7 with .357 mag. AA9 and heavy bullets in .357 mag. is also a good combination.
Unique could work but it isn't a powder I care for.
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