A lot of it's going to depend on your set up and sight window of your bow. Normally one of the movable sights would be the way to go for longer range stuff I would think. However you may not be able to get that kind of range out of your bow. As the range increases the sight drops. Eventually it will be in the way of the arrow, or out of veiw in your peep sight. You may have to move your peep sight and change your anchor to shoot at those distances.

I've never tried it, but I think it would be difficult to set up a bow to shoot at 100 + yards, and shoot at 20 yards. I can get about 70 out of mine.

Paul