I've never owned a 32 gauge, but I did own a 24ga Beretta OU . . . briefly. Found out by accident that it would shoot 28ga shells. But they slip past the extractors, so kind of a PITA.

Initially, I thought a 24ga might be neat. Half way between a 20 and a 28. Only problem is--at least as far as I know--they're all 2 1/2 inch guns with a lighter shot charge than the 28's standard 3/4 oz--never mind the 7/8 and 1 oz 28's you can buy.