clues
Try HS6 or AA9 with that bullet.
Try a Redding Profile Crimp Die, medium/firm.
(Did you first size your new cases?)
Try shooting a larger number of fouling rds first before shooting groups.
Try a different bullet.
Try L'IL GUN if you already have it.
DON'T: switch cases / primers.
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"all my ammo is mostly retired factory ammo"
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