I would suggest the term "crimp" be avoided when discussing loading semi-auto ammo; causes a lot of confusion to new reloaders. I have never "crimped" a 9mm or 45 ACP cartridge, but I have "deflared" a few thousand with taper crimp dies. I use the barrel of the gun I'm reloading for as a gauge to determine if the bullet is seated properly and the flare has been removed from the case mouth. Yep, the old "Plunk test"...
IMO; if you can see indications of a "crimp" on pulled bullets, it's too much.
My Anchor is holding fast!
I've learned how to stand on my own two knees...