I've been a casual trap/skeet shooter for years. Reloaded my own shells for a long time and had one of those pigeon flinging machines. Cheap one, bolt to a car wheel, hand-cockable, and would throw 2 discs.
I have been using an 870 Wingmaster with an un-ribbed 26" barrel w. a bead sight all that time and can keep up with the other guys w. double-barrels and autos OK. I have never shot competitively or at a club other than a couple of organized outings with work-mates where they have organized sporting clays. Most of my shooting has been with groups of friends in local gravel pits, or on private property. Rule of thumb is the guy or pair of guys with the least hits pays for the pigeons and we all split the beer and cleanup duties afterwards. Since it's a casual sport, I've never yearned for a gun any more equisite or specialized than my 870. I just love a pump action scatter-gun.