I'll start us off. The following groups were shot with my AK-47 SAR-1 with stock iron sights and Wolf ammuntion.
In the first two, I bench rested and shot from 50 yards. I fired 30 rounds at each target. Groups were between 4.5-6.5 inches.
http://www.glocktalk.com/attachment.php?s=&postid=4681971http://www.glocktalk.com/attachment.php?s=&postid=4681975In the third, I shot offhand standing from 50 yards. I fired 50 rounds at the target, of which 41 hit the target. The grouping (on paper) was about 10 inches.
http://www.glocktalk.com/attachment.php?s=&postid=4681977In the fourth, I shot bench rested from 100 yards. I fired 30 rounds, of which 23 hit the target. It is difficult to determine the grouping due to the wide spread, but I'd say about 14 inches. Keep in mind that by this time, I had already fired a couple hundred rounds so the barrel was pretty hot.
http://www.glocktalk.com/attachment.php?s=&postid=4681982Summary:
At 50 yards, whether benchrested or offhand, it was relatively easy to hit a 1-square-foot target.
At 100 yards, benchrested, it was relatively easy to hit a man-sized target with an AK-47.
I would estimate the maximum range at which I could hit a man-sized target consistently with an AK-47 is 200 yards.