^That's well put, especially where you say that "minimal" is easier to define.
I have personally found however, when you get in to the big stuff, you've got to get downright hardcore with the crimp. .460 S&W Magnum at 60,000 PSI. Yes, for sure the other rounds wish to lurch under recoil, but I've also had examples (more than I enjoy!) where not going full-nuts on the roll crimp has wildly affected how the round builds pressure and ultimately fires. To say that not enough crimp "negatively affected ignition" is a genuine understatement.