I hunted with a young man last year that shot two giant canada geese with a 20 gauge shotgun and #2 steel. Both birds were shot 30-35 yards and both were dead when they hit the ground.
I do a lot of waterfowl hunting with a 16 gauge shotgun. I reload and when I use the 16 gauge for geese, I use 7/8 oz of #1 or #B steel for geese. That being said, I do prefer my 12 gauge for goose hunting.
Neither the 16 gauge nor the #2 steel are ideal for canada geese. However, it can be done if you let the birds work close.
That's what I have. An Ithaca featherweight. Love the gun. Killed one Sunday night but just wanted some opinions to make sure it wasn't a fluke.My 12 yr old son shoots a 16 ga. It is an Ithaca featherweight model built in the 40's. The older guns from 30s and 40s were built for smaller statured men. the featherweight models have lighter barrels so he could handle it better than a 20 gauge. When you look into the difference between a 20 ga 3" shell in number 2 shot and a 2 3/4" 16 ga there is only like 4 pellets difference. The 3" 20 ga shell is what killed the popularity of the 16. It made the 16 sort of obsolete.
He had no issue dumping geese with 2 shot during the late season last yr when we were field hunting. The big downside is the lack of available shells/shot selection and the cost.