Season it well. Salting steaks, and the salt’s ability to season the meat, works like a … Sirloin (1 1/4 inch thick) Medium Rare: Grill 8 minutes per side or to 140°F internal temperature. Let steak rest for 10 … Medium: Grill 10 minutes per side or to 155°F internal temperature. … 9 – 10 minutes per side. 7 minutes per side. 3. Medium: Grill 10 minutes per side or to 155°F internal temperature. After cooking your steak to perfection, you will want to check for doneness. Check Doneness - Internal Temperature. Roast until internal temperature of steak is 125° for rare, 135° for medium rare, and 145° for medium, about 8 to 10 minutes. Remove steaks from the grill when a quick-response meat thermometer inserted through the side of the steak to its center reads the … 8 minutes per side. *Note: Well done steak cooking times are dependent upon your personal preference and may be cooked for longer times.