I own an A302 which is 3'' chambered and has strictly a full choke (not interchangeable). I considered changing the barrel due to what I thought was a safety compromised barrel (shooting thousands of rounds of steel out of a full choke). After consulting a gunsmith, I learned that the Beretta's chromed steel barrel expanded the full choke to a modified choke without cracking or splitting the barrel and/or did not loosen the vented rib (which he has never seen before). I noticed one reply states that Browning's barrels would fit... it does (one in particular).
Beautiful, light and comfortable, the A302 is (was) my favorite! However, it does suck considering you can't cycle any loads you want... they have to be heavy loads (1 7/8 oz is too weak). I even had 1 3/8 oz not cycle properly. To me, the A302 became garbage.
Now, I'm saving my pennies for the Benelli Super Black Eagle II. I've searched, read, dug, asked, inquired, ..., I did ALL the homework and, in my opinion, the Benelli shotguns might not be very attractive but they seem to be the cherry on any cake. I have until the fall for someone to convince me otherwise but I doubt anyone can.