I love Costco Prime beef, so many steaks are to choose from all of them are excellent. I cook them on a charcoal grill 6.5 minutes per side depending on thickness. A little sea salt and pepper; let them rest for 15 to 20 minutes and they are perfect. Use that 15 to 20 minutes to finish whatever sides you have planned that way you aren’t just waiting for the steaks and there is nothing worse than being hungry and having great food sitting in front of you, 15 to 20 minutes seems like a life time! Happy grilling.