LOL. Where did you come up with that one? Punching power is more than weight, but size does matter. Why? It is called physics: Force=Mass x Acceleration.
It goes back to Newton's second law of motion. The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
All things considered equal a 330 lb guy can hit harder than a 225 pound guy. Put another way, the 225 lb heavyweight can outpunch the 125 lb Featherweight or 120 lb Super Bantamweight.
Louis was 6'2" and 207 in his prime. His superior boxing skills would have probably carried him to victory. Although Louis is rated as the greatest puncher of all time by Ring nmagazine, I don't know if he would have knocked this guy out. He would be giving away 125 pounds. Louis was 69-3 with 55 KOs.
Primo Carnera only weighed 260 when Louis KO's him in 6. Billy Conn, a lightheavy, shook Louis up several times in their first fight and would have beat him by decision if the hard headed Irishman hadn't decided to try to take Louis out by KO. Instead Conn got KO'd in the 13th round.
Ping