If you can't shoot a sub-6# gun all that well--and a lot of people can't--then owning a 28ga that weighs 6+ makes sense. On the other hand, the reason most people go to the 28ga is weight reduction. I own 2 20's and 1 16 that are all within an ounce of 5 3/4. I like 28's, but unless I want something lighter than 5 3/4, why would I want one? And if I want to shoot 7/8 or 1 oz loads, there's a lot more choice for the 20ga--and even for the 16ga--than there is for the 28ga. And the bigger bores will likely pattern those loads somewhat better.
Larry's post pretty much sums up why I no longer own a 28ga.
My posts on the Winchester 1oz 28ga loads are only to point out that in my limited experience they are decent upland loads that give the 28 a little more versatility and that although recoil of the one ounce load is definitely stiffer than the 3/4oz load, it really isn't much different than the 12 to 15 foot pound range produced by most commonly used upland loads in 20, 16 & 12 ga guns.
If a guy has a modern 28ga gun with 2 3/4 chambers & appropriate proof for U.S. SAAMI spec loads you can come very close to duplicating 20 ga performance if you feel the need on occasion. I think a lot of people like to shoot the 28 ga simply because of bragging rights & the novelty of it more that the lightness of the gun.
