Don't hit them. That's not going to work. If it doesn't work with dogs (who are much higher in intelligence) it's not going to work for chickens
You have two very different breed temperaments. RIRs are known for their bossy attitudes, and BOs are known for their very laid back - submissive personality types. The BOs will be on the bottom for a good while.
I would just let them do what they are doing. They will work it out eventually. Don't let the new ones range until they know where home is (ie: The coop).
Aoxa, thank you again. I was just going out to the coop and literally paused on the way out to check the thread, hoping someone would have chimed in to say don't swat chickens. I've been more unsure of myself than usual with this (I think the emotions of chickens are more contagious than those of any other animal I've cared for!), and when I brought the topic up at dinner my DH started with the whole "well of course you swap the bossy chicken" line-- he said, "it's to show her who's boss. You just don't want to understand how the world works sometimes."
The four people who hae advised me to swat are all men; that fascinates me.
Getting back to the chickens-- yeah, I was worried about the breed difference, but they're going to have to work through it, just like me and my DH. I've been letting the older ones out for a couple of hours a day just to let some steam off in the coop. Is there ay reliable way to know when it's safe to let them all out, when they might range as a flock, so my buffies won't skip town completely?