RE: 16 gauge? 24 & 32 gauge?
I have over 4500 rounds of Win. and Rem. factory 16 ammo that I have less than $3.50 a box in. I find heavy and light hunting loads of all size shot with ease. Kent's TM 16 gauge load was the best buy out there in heavy as lead non-toxic shot shells. Steel loads are not that great in the 16 but there is one smaller outfit that sells a nice 1450 fps steel 16 ga load that works as good as you can expect steel to do. And at 6 lbs 8 ozs my Sweet is the perfect weight and balance.
Most people do just fine in a one size fits all you must do like me world. The rest of us like to mix things up some by matching the gun to the job at hand. We shoot .410's, 28's, 20's, 16's, 12's and sometimes even the 10.