Disclaimer: I don't have a Stoeger, but do have other semi-auto 20's in the Benelli family. It's universal to them. Not an ejection problem. Three inch shells, including Federals, will load, fire and eject fine. The problem is getting most roll-crimped 3" shells to follow the previous shell. It's a matter of overall length of the shells. Everything else being equal, roll-crimped shells are slightly longer than star-crimped/folded ones. Some here have said roll-crimped Apex shells are shorter and will feed fine.
