Sorry, I should have explained further. With a modified choke the possibility of "ringing" the barrels still exists. How great that possibility is depends on just how tight the "modified" choke really is (311's were choked pretty tightly), the size, quantity and velocity of the shot load you are shooting (smaller shot and less of it at lower velocities is better), and the strength / thickness of the barrel steel (311's have relatively thick barrels of mild steel).
If it were mine, I wouldn't risk the gun for the sake of steel shot. Either open up the choke(s) ($), shoot tungsten polymer shot instead ($) or get another gun for waterfowl (the only reason steel shot is necessary). Shooting tungsten polymer loads will give you a superior waterfowl gun if you only hunt ducks or geese occasionally, it gets too expensive if you are an ardent waterfowler.
Sharptail



























