forcing cones, etc ??

[brassmonkey]

What is the advantage with lengthing the forcing cones and overboring barrels? I thind Beretta overbores their barrels. Does Benelli?

[jimmyn75]

According to the Beretta catalog the advantage is that the bores are maxed out so there is less friction on the wad as it travels down the barrel. Also it tends to compress the shot less so there is less likelihood of deformed pellets. I have read that Benelli does NOT do this because it would interfere with the cycling of the inertia system. From what I can see the only semi-autos that overbore the barrels are gas operated ones. I wouldn't make that trade off. Went out with a cousin shooting trap and his 1100 could not cycle trap loads, but my Montefeltro shot all day long (500+ rounds)