If you take it out at 165 and tent it with foil, the temperature should rise 5 to 10 degrees. So if you cook it to USDA, it will be overcooked. If the legs seem not done enough after resting, cut them from the breast and return to the pan in a hot oven for 20 minutes.

165 is what many cooks, and especially chefs do. 175-180 is USDA standard.