I tried some 3" shells in my Ohio-made Ithaca 37. Didn't like the recoil, so I went back to 2-3/4", 2's or 3's. Didn't see much in 2-3/4 available for quite a while, but they are starting to show up again here and there.
I only use Kent fasteel 2 3/4" #2 for all ducks. Kills em just fine
I and some others I know have experienced an unacceptable number of misfires with the Fasteels in recent years, both 2-3/4 and 3s. Primer is dimpled followed by a poof instead of a bang. I had a similar occurrence with some leftover Drylocks I switched to. Thinking about trying something else. Any suggestions?