I always use the Reynolds Cooking bag too and I stuff the turkey. I roast it at 350* for 2 1/2 hours and it has never failed. I do have an old oven and use a temperature guage to check the oven temp. I double check the bird with a thermometer in the breast part to make sure it's done. The only time I goofed was when I stuffed the turkey and tried roasting it for 8 hrs only to realize I never removed the orginal giblet and gizzard bag that came with the bird. That bird went out with the trash. LOL! Happy Holidays!