Of course these rifles are scoped. Fact is, that most rifles are a lot more accurate than their shooters. Inability to get close groups is usually the shooters fault and not that of the firearm or the ammunition. I will lay you odds that if your rifle were to be attached to a bench or heavy platform and you were able to see the results, you would be amazed.
The point being that some have and incredible talent. Larson could keep a can in the air with a bolt action rifle without sights (watched the man do it when I was a kid), Knapp is no slouch with a shotgun, and there are others. Known and unknown. All of these shooters have a natural talent. You can only train to your ability.
No such thing as a stupid question. What is stupid is not asking it.