New rotors, old hub...

Did you use a press to press the studs in?

No. I thought about it but have seen plenty of people driving them In with a hammer/swift setup (not mounted in car obviously) .... just a wee little bit at a time on all of them at the same time. They are super tight in the hub, but the rotor... I can rotate counter and clockwise just a hair. I don’t think a press would have helped this. They were loose the entire way in.