If you use multiple pins you gap shoot. I use a 20,30, and a 40 yard pin. If you want to shoot at 25 yards or 35 yards you just aim with a point half way between your pins. In your case if you had a 15 yard pin and a 25 yard pin and wanted to shoot at 20 yards just split the difference between the two pins and that will be 20 yards. You don't have to use a pin to shoot, it is just a reference point.

I can even shoot at 50 yards with a 40 yard pin.

If you were uncomfortable with your bow turned up, turn it back down. You probably didn't gain that much speed anyway, for sure not enough to effect your trajectory enough to warrant moving your pins.

If you want to be able to place a pin directly on your target at every range you will need to get a single pin movable sight.

Paul

Sharkey posted while I was typing. If you are having trouble understanding what we are saying I can make a picture to show you.