I grind my own turkey (and chicken) in my food processor with just the chopper blade. It helps to cut it into cubes first, don't fill the bowl more than 1/2 full and use short bursts otherwise you will grind it to moosh. It also helps lots to lightly freeze the meat first. You don't want it frozen hard, just enough to firm it up. That makes cubing it easier and it grinds better too. I hate boning meat but if you use the bones in a soup you can ease your conscience if you don't manage to cut all the meat off.
"When you are in love with someone you want to be near him all the time, except when you are out buying things and charging them to him." Miss Piggy