How do you cook a 50pound steamship round in a convection oven?

To cook a 50-pound steamship round in a convection oven, first preheat the oven to 325°F (163°C). Season the meat with your preferred spices and rub, then place it on a roasting rack in a shallow pan to allow airflow. Roast until the internal temperature reaches about 130°F (54°C) for medium-rare, which can take approximately 2.5 to 3 hours, depending on your oven and the meat's starting temperature. Let it rest for at least 30 minutes before carving to ensure juiciness.