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You might want to try Universal Clays and/or SR-7625 in your .380 Auto. They are a bit denser than Unique with the same burn speed. Universal excels at the heavier bullets in the .380 Auto so should do well with that 100 grain bullet. SR-7625 was a power that I used to reach 1,000 fps with an AMT Backup and 90 grain XTPs back before there was a Universal Clays, around 1987 if I remember correctly. I think SR-7625 has been discontinued, so don't look too hard for it.
