click I practice with three pins until a month before the season opens, then I go with my 20 yard pin and practice at distances from 10 yards to 40 yards with the single pin, the flatter your bow shoots the less you will have to hold slightly high or low.

The advantage to a single pin is you will never confuse one pin for another when the buck of a life time presents himself to you. Dis-advantage, if you practice enough with a single pin there are none.