One thing I've observed shooting prone slung up hand holding the rifle, when scoped, the shots are easier to call where the rifle was aimed at when the round fired. It's easy to call within 1/10th MOA of where the shot fired at. Regardless of where that point was on paper, if the bullet didn't land within 1/3 MOA of it, it wasn't zeroed for the conditions. With aperture sights, few of the best, if any, can call shots within 1/4 MOA consistantly.
In zero cross wind wind conditions, the top scores are close in points as well as Xes for both sight types. In moderate winds and the scope's focused about 2/3ds down range to the target, you can see the mirage (heat waves pick up and drop off then hold off to compensate. That's typically better than going out of positioin to twist a sight knob because you sometimes do not go back into the exact same position to fire the next shot. And that means the barrel's going to point someplace else besides where you want it to when the bullet leaves. You cannot see the mirage change looking through metallic sights.
With rifles and ammo that tests well under 5/8ths MOA at 1000, the prone shooter holding the aiming area in a 3/4ths MOA circle (damned heartbeats swelling/contracting wiggling muscles attached to bones holding the rifle) trying to break his shots inside a 1/2 MOA area will throw a party if all his record shots are inside 2 MOA on paper and 3/4ths of them inside 1 MOA; a 200-15X score.
In zero cross wind wind conditions, the top scores are close in points as well as Xes for both sight types. In moderate winds and the scope's focused about 2/3ds down range to the target, you can see the mirage (heat waves pick up and drop off then hold off to compensate. That's typically better than going out of positioin to twist a sight knob because you sometimes do not go back into the exact same position to fire the next shot. And that means the barrel's going to point someplace else besides where you want it to when the bullet leaves. You cannot see the mirage change looking through metallic sights.
With rifles and ammo that tests well under 5/8ths MOA at 1000, the prone shooter holding the aiming area in a 3/4ths MOA circle (damned heartbeats swelling/contracting wiggling muscles attached to bones holding the rifle) trying to break his shots inside a 1/2 MOA area will throw a party if all his record shots are inside 2 MOA on paper and 3/4ths of them inside 1 MOA; a 200-15X score.