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The heavy crimp can mean that neck tension is compromised. The bullet swages and brass springs back. I'll post a pic later to demonstrate.
As promised, here are pics to illustrate concepts. For grins I sometimes take apart range pickup ammo. Here are bullet dimensions after a "heavy taper crimp". Not shown is the fact that the bullet creeped forward in the case from chambering. This had a light primer style and was likely a dud that got racked out.

.451" bullet. Note the various measurements.







 

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My .38 special loads are oversized after seating and crimping. They wouldn’t fit in the chamber. Ironing them out in the LFCD got them to chamber properly. But I don’t prefer to solve the problem that way
Yes, you shouldn't have to.
 
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