Every little mistake at 10 yards is magnified when you go out to 20 yards.A little torque here, a drop of the bow arm there, at 10 yards you still might hit all of them in a small 1-2 inch group. At 20 yards it gets much worse. Also, a lot of people have a harder time holding their pin steady when the target looks smaller because of distance. I will be honest with you and tell you I was never able to get a WB to fly right for me out past 15 yards... Some people I know shoot them great but I had to scrap it twice because I just couldn't get the consistancy that I wanted