At one time I had a bow that shot 275 fps. I shot the bow at 10, 20 and 30 yds with my 20 yd pin. Then 20, 30 and 40 yds with my 30 yd pin. Then 30, 40 and 50 yds with my 40 yd pin. I recorded the data in + or - inches and came up with a range in yards for each of my pins. If I remember right, the pin with the largest range was my 30 yard pin. I'll have to look around and see if I can find that sheet then get back to you. I think that the 30 yd pins range was from 25 to 34 yds to stay in a 4" circle. I'll check.