JNL PRX III Tuner

*Can't be bored bigger than .950

*Set your Tuner with the Purdy Prescription as oultined by Tony Purdy in the 9th Harmonic

*Measure your exact barrel length from the breech to the muzzle to properly set it

*Greatly simplifies your tuning procedure

*3 Nylon Tip Screws to lock down your tuner once it is set

27" Barrel = 3.099 in tuner length 

26" Barrel = 2.974 in tuner length

25" Barrel = 2.849 in tuner length

24" barrel = 2.724 in tuner length

23" barrel = 2.599 in tuner length

Tuner is adjustable from approximately 1.675"-2.075" in length

Each number on tuner is .001" longer

Add the .5", 1.0", or 1.25" Extension to get the appropriate length

The 1.0" extension comes with the tuner at no extra charge