Been loading 45 ACP for many, many years. Only use 185 or ~200 grn cast SWC or jacketed rounds. Making Sure your cases are the correct length After sizing is 1st thing. 2nd is using a Taper crimp as headspace is off front of case. Adjust crimp so the case is larger than OD of bullet, not squished into the bullet( can easily happen with cast rounds).
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