Deerslayer, If you can kill ducks at 60 yds. with your 12ga. but can't kill a goose at 20yds. the problem is not the gage of your gun. Have you patterned your goose load.
I've owned several 10ga. guns, although not a remington. The ones I owned sure were massive and heavy. You need to be a body-builder to swing one. Regards, Byron