Without drag radials like the demons come with, the Hellcats on regular street tires are down right dangerous. And impossible to use the full measure of their power until nearly the highway speed limit.
I have had several 300s, Chargers, and currently have another Challenger. I have always said that the V6 does a super job in those cars, especially with the 8 speed trans. Even the 5.7 is overkill for most any situation. Including highway on ramps.
I may get a Hellcat at some point. If that happens, I will put drag radials on it right off. It won't get driven that much, so their short life won't matter. But, if I feel the need to unleash that thing, full power will be available before 60MPH.