Thanks Scott. I am no expert in anything, much less bee weight, but my best guess is that the swarm was between 8-12 pounds. I did the first shake into a double deep with frames of foundation in the bottom and nothing in the top deep to serve as a funnel. When I shook them they overflowed the top box. Man it was cool. The second shake garnered me about 6 stings, I think mainly because they had been through a morning rain storm and were a little angry. I will always remember that one.