No way to know unless you try! I took my .308 out over Christmas break and was stretching its legs out at 500 yards. My father (who hasn't shot a rifle in 20 years) and my little brother (who has never shot anything more than a .22) decided to tag along. Both of them wanted to take a shot, and believe it or not, both of them put their first shot in the bullseye!
Now, I knew beforehand that my rifle was more than capable of shooting under 1.5 MOA at that range, but I still have my doubts about my own abilities
Get out there, shoot some, and work your way out to 500