Broadheads and field points are both affected. It has become so common place that I just move the sight 3-4 clicks out in the mountains and 3-4 clicks in when I come home. I have a level built in to my Bullseye 1-pin fiber optic sight and use it religiously. the lowout is roughly level with maybe no more than a 3 foot drop over 50 yards. The real clincher was last weekend when I shot at a buddie' s camp about 10 miles away(but still on the mountain top). This was the first time I shot up there this year and forgot to move the sight and saw the same thing I occured all last year.