you should be good to go. When mounting a tv of that size my primary concern is wether or not the mount will hold it. Assuming you got the appropriate mount you're good. Just make sure you hit your studs so that you don't miss to the side and then you may be in for some unpleasantness. Bottom line is if you're hitting straight into the studs you should be fine. People hang big kitchen cabinets and even floating vanities from the studs.
use your stud finder to mark out both sides of each stud and then you can be sure to drill straight into the middle of the stud.