A real rifleman can use iron sights as well and sometimes better that a scope.
Fer Instance.....
The home of the NRA (The original, not the johnny come lately) Bisley Camp has multiple Rifle shoots each year. The Biggie, The Queen's Prize, is shot at 12' by 10' Targets with a 2' Bull and 1' Xring. The distances are 800, 1000, 1200 yards the rifle has to be a No1 or No4 pattern rifle with open sights and the 303 cartridge. About every other year the winner knocks down a possible (60 shots in a 2' circle) and about every five or six years there is a possible X. That is 60 shots in a 12" circle twenty from each of the 800, 1000, 1200 distances with iron sights.
Dr Mann tells us that if the barrel is good enough, held still enough and the wind remains the same, shots will fall to the same place throughout the trajectory.
The rest is the rifleman.
It chokes me to say it, but that is why the marines are so effective, they train riflemen.
![Embarrassed :oops:](./images/smilies/icon_redface.gif)