Waterfowl opens this weekend, and as I was buying my license I heard an interesting discussion. One gent was claiming steel shot has a greater range out of an modified choke than a full choke because the shot is not as constricted. I have alway's used full chokes for waterfowl, but usually use bismuth as steel tears up the older Browning barrels and bismuth has more range. But I have used steel in my Winchester 1200 and I am wondering if this argument has any validity. Anyone care to comment?