It’s common for the temperature to drop by about 25 to 50 degrees after placing the turkey in the oven. Maintaining around 425ºF (218ºF) after flipping and brushing is crucial to ensure the meat cooks through. I will turn the oven temperature up 25 to 50 degrees during transitions for a few minutes to quickly heat, then turn it back to 425 degrees when roasting to maintain the temperature.