Set your Tuner with the Purdy Prescription as oultined by Tony Purdy in the 9th HarmonicMeasure your exact barrel length from the breech to the muzzle and we will set it for you.Our setting should be within a 1/2 turn in either direction.Greatly simplifies your tuning procedure3 Nylon Tip Screws to lock down your tuner once it is setWe will set it for you before shipping
Be sure to give us barrel length and diameter when placing your order.