My Beretta 391 has both a chrome lined chamber and bore. So it's basically impervious to internal wear. It is made for high volume shooting.

2 dogs. I have a Belgium made 28" VR 20 gauge humpback that was passed down to me by my grandfather. I love that gun and won't hesitate to take it on a dove shoot here in the states. I've killed truckloads of doves with it over the years. But, I can promise you, in Argentina, that same gun would be in pieces getting a full gas system cleaning or you'd be shooting one shell at a time, 2-4 hrs into the first day's shoot. It will hold up as far as not physically breaking (unless you get the barrel so hot that the rib detaches) but the gas system isn't robust enough to keep functioning properly while shooting 750-1000 rounds a morning. Berettas and Benellis will.