You'll have no problem using Rios . . . as long as they work in your gun.
There are complaints online of Rios getting stuck in semi-autos and failing to extract. The theory is that the heat and pressure from ignition swells the "brass" (I think it's really steel) and when the auto tries to automatically extract it, it jams.
Whatever the theory; I personally experienced this last weekend while shooting a pump. I switched to cheap-o Federals and had zero issues. And I have zero issues with the exact same Rio shells in break-action guns. And maybe I just got a bad lot of shells.