It's called getting a little "edge".

Remember; When we only had 2 3/4" shells.

Well, IMHO, 3 1/2 shells: More shot, more kick, more price. 3 in. shells, not as much kick, cheaper, shell for shell and IMHO, only very experienced long range shooters can benefit with 3 1/2 shells. Hell, get a Rem 10 gauge, and a 10 gauge reloader and really have fun. That way you can load 1 1/4 oz. for ducks and heavier for geese. I did. And it was FUN watching those mallards fold cleanly.

I went back to 2 3/4 and a IC choke and take shots no more than 30 and do just fine!

JW

getting harder to find steel in 2.75 these days.

You will be just fine with a 3" gun. if you are on a limited account, as many beginning hunters are, buy yourself some cheap 3" BB's and have fun shooting geese. These are more than enough for geese inside 40yds. Just remember to limit your shots and you will take geese.
If you can spend a bit more, buy some higher $$$ shells and get some 3' Hevi-Metal in 2's or BB's and you just extended your range 10 yds but at almost 2x the cost. Either way, hunt smart, not hard and you will take many geese and have fun while doing it and not be broke and beat up.