Sorry, I just can't agree with the writer. I have used the 3" 20 gauge some, and researched it quite a lot. Compared to the 2-3/4" 12 gauge, the 20 mag has
higher pressure, lower velocity, longer shot strings, poorer patterns (especially with shot larger than #5) , and is more expensive to shoot. That does not mean that you can't do a good job on ducks with one. My son used a Browning Magnum auto 5 for several years for both ducks and geese. Faststeel #3's seem to kill very well within about 35 yards. At 40 yards you'd better have a good dog. Farther than that you're pretty much just crippling most birds you hit. The practical real world difference in range between a 20 and a std. 12 is probably 10 yards. Some self restraint is called for, as in most things.
There is nothing wrong with choosing a magnum 20 for occasional waterfowl use. But it is in no way equal to a 2-3/4" 12.[/QUOTE]
Well researched and right conclusion