Not sure on the accuracy of Wikipedia about this subject. If this is actually a quote by Baker, perhaps he was grandstanding, or perhaps "addled" by the heavy recoiling guns he normally used.

I would put more faith in this statement if it was a re-print from "The Field" magazine/paper.

Punt guns were up to 2", I believe, most common between 1" and 1 1/2" though and 50 pounds or more.

Common shot charge, was up to 3 pounds of #1 shot. I don't know what the powder charge was, I can only assume 10 to perhaps 18 drams depending on the bore size.

Most ducks killed/wounded with one shot, was 128, seems to me. I might have that number mixed up with the largest 'string' of bison killed from one "stand".