Thread: Help please: 2 3/4” vs 3” 0/U for ducks?

Hi there! Please bare with me as I’m guessing this is topic is like talking best rifle calibres over a camp fire…
Do I need an 3” gun or is 2 3/4” enough to bag a few ducks?
And Standard steel VS high performance stuff?

Nobody around me is into gamebird hunting so asking you all for some of your hard earned experience, thanks in advance.

Background - I’m coming over fresh to the shotgun world from a deerstalking background, never had the opportunity to try it before, but now I’m looking for an O/U to learn the art of duck shooting. Keen on an O/U as have a young dog who’s turning into a good wee hunter. Rough shooting / jump shooting really appeals as this is as much about the dog as it is about expanding as a hunter.

Reasonable secondhand O/U with open enough chokes for steel are rare as hens teeth it seems, let alone a high proof one.
Been looking for a long time and finally found a pretty good deal to consider - its a mechanically tidy ‘92 Miroku 7000 gf-1 with 2 3/4” chamber and multichoke…
Is this a good option?
Or should I search on for 3” and higher proof rating?