Some people mentioned Swiss rifles.
Have any of you guys watched Youtube videos titled "420 yards", done by a guy in so. CA?
He also used a Swiss K-31 to hit a gong at 1,000 yards, with 'iron sights'.
Try searching "1,000 yard Swiss" etc, and tell us what you observe.
You can hear a few bullets hit the gong.
He even zooms from the small gong back to his position, and also traces it with Googlearth.