.015 and .025 if you can shoot lead, .010 and .020 if you must shoot steel as it does pattern tighter wold be my choices. But chokes are a very personal thing to many, just like blond, red hair, brunets or any other hair color you like. Just get into a range like .010-.020 for one barrel and .015-.025 for the other. Then adjust your shooting style to match conditions. Changing chokes might be no fun with chrome lined barrels. Many gunsmiths hate working on them over here. Good luck and enjoy the finding out for your self.
