Second the V. Bernardelli hammer guns. Not sure who imports them now, but they are solid guns and reasonable as these things go. Not sure if the Italias come with 3" chambers in 12, tho. The bores are chromed with an alloy that's harder than woodpecker lips from the Petrified Forest as we used to say in Sonoma County--chamber lengthening is at the peril of your reamer(s). I have a 16 Italia from the middle of il Duce's time; old but still good. I'd suggest the plain Italia for ducking.