Using the term "crimp" when talking about semi-auto ammo can/is misleading to new reloaders (and some old guys too!). No actual crimping is needed. Mebbe we should say "De-flaring" or "Mouth Straightening" rather than crimp. I "de-flare" all the case mouths when reloading 45 ACP with a taper crimping die, I do not crimp...