Most all of my shotguns are sxs. I have one hammer gun, and L.C. Smith that I fit 3 extra barrels. The one set is from a Grade 1 "elsie" 30" and I thought was the original length, but a records check stated they were originally 32". These barrels have .009 constriction and for sporting clays they shoot very nice. I only shoot 3/4 oz in 12 ga. and it is impressive to see how far it will reach out there.
A set of 32" with .041 and .042 constriction is worthless on sporting clays for me, but shooting trap it is very nice. Again the same 3/4 oz loads.

I had read one time that most of the great shooters preferred full choke guns because they knew what to do and wanted the most pattern in that small circle.

David