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Big assumption: You are full length resizing. Die mouth solidly in contact with the shell holder at full stroke.
First: If all resized (but empty) cases load and extract OK, you do not have a resizing problem.
Second: if any loaded cases then fail to extract before firing, you have either a bullet length
problem (unlikely) or a crimping problem that's deforming the case shoulder. (more likely)
Solution: Do not (repeat, NOT) crimp at all....back that seating die at least one full turn
away from any contact with the empty case mouth... then try those rounds for function.
Third: If rounds will chamber/extract OK before firing, but then stick/fail to extract upon firing, we'll go to the next step....
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