So there it is: 4 hours and 20 minutes to 5 hours at 325°F. That’s the magic math for your 20-pound bird.
Remember, the turkey is just a vessel for the real star: the people around your table. If it’s slightly overdone, laugh it off. If it’s perfect, take a bow.
You’ve wrestled a twenty-pound fowl and won. That’s not just cooking—that’s heroism with a side of cranberry sauce. Now go pour yourself a glass of wine and enjoy the feast you magnificent bird-wrangler, you.