Yeah, I believe you. A good friend of mine can shoot 1" groups with iron sights on an old Swedish Mauser that he has. Another guy I know has a Dragunov rifle with a fixed 4 power scope gets incredible groups at 100 yds. (.5 - .75")

It probably has something to do with my eyes. I have been wearing glasses since the third grade. On my target and varmint rifles, I generally put a variable scope that tops out in the 16 to 20 power range. My favorite scope for this purpose is the old model Leupold Vari X III 6.5x20. I have 3 of them mounted on some tack driving rifles. On my hunting rifles, I have a different set of priorities and am not so concerned with 100 yd groups.