Ask how big the "bullseye" is on the 1000 yard target.
I find in certain cases, I actually shoot better with iron sights than I do with a scope, especially when shooting unsupported or from a rest. The scope actually provides to much information when it comes to perceived movement, making it a distraction.
As kraigwy stated, its not about the range or the type of sight, as much as it is the fundamentals. Get the basics down as best you can, and everything else just starts to fall in place. The more you shoot "properly", the more you learn, and I think youll find, you never stop learning.