Got my first "Jaws Moment" (We're gonna need a bigger box) the other day on a swarm call.
I'm gonna guess six pounds... This thing was HUGE.
I set them up in three 8 frame mediums with 8 frames of honey, two frames of pollen, 6 frames of drawn, and 8 frames of undrawn. All mixed in what I think was a healthy mixture. They were still boiling out. They bearded up the entire front and around the edges a bit going into the night.
It was warm, so that might have contributed.
So, how many boxes per estimated pounds of bees? Most of my swarm calls have been nuc sized to start with.