I want to band birds, but with the massive variety of sizes, I'd need to buy a pack of every size. From button quail to the monster sized legs of the bb turkeys.
As for ranging the bb's, mine do as well as the royal palm. My hens are only twenty pounds at eight months though. But, that's a lot of meat. My dominant tom is bbb/royal palm. He wouldn't be muchworth eating though. I'm hoping 75% bb and 25% palm will give me a better meat bird with males that can still give me 100% fertility. The mixed tom I have was actually a result of a bbb tom over a palm hen, but I'm not sure what their fertility rate was.
My biggest problem with the bb's is the butchering. While I hate standard bronzes and most other breeds enough to be all too happy to kill them, the bb's are more like puppies. Not easy to kill a bird you've raised for months who comes to greet you everytime they see you. In fact, I have yet to kill one, except the one I accidentally ran over.