View Full Version : Tuner Problem

03-07-2014, 06:19 PM
I just had a new Shilen ratchet barrel installed and I did the Purdy Px for the tuner setting. My barrel length is 25.8 so my tuner length should be 3.03".
The problem is to get my tuner to 3.03" I have to turn it past the O-ring for this length. I am open for suggestions. The tuner is Harrells.
Jeff Fountain

Fred J
03-07-2014, 07:27 PM
Jeff: How are you measuring your Tuner?

Jerry H
03-07-2014, 07:27 PM
Try a .5 long weight and recalculate.

03-07-2014, 07:53 PM
Hi Jeff

You look to be pretty well dead on the numbers, I come up with 3.039. I agree with Jerry, try .5 weight ring. Just remember you will have to recalculate the EC.

Tony Purdy
The Purdy Prescription

03-08-2014, 05:28 AM
If your outer shell is more than a farther out than the inner tube, you will
need to refigure the PL by using the EC for the outer shell.
Usually the outer shell of a H/H tuners are about 1.34 inside.
Try using 1.34 instead of .62 in the formula.
This will give you a physical length of 28.623 or a crown to tuner length of 2.823"

Make Sense?

03-08-2014, 07:15 PM
Guys thank you for your replies and info but what is the EC? I don't want to sound stupid but I am measuring the inside of the tuner from the barrel to come
up with my 3.039 length the formula comes up with.

Fred J
03-08-2014, 10:26 PM

Which of these two tuners look like yours?
http://i150.photobucket.com/albums/s86/FredJ_2007/LtHRecessed_zps3af2ed32.jpg (http://s150.photobucket.com/user/FredJ_2007/media/LtHRecessed_zps3af2ed32.jpg.html)
http://i150.photobucket.com/albums/s86/FredJ_2007/LtHThreaded_zps8de7c401.jpg (http://s150.photobucket.com/user/FredJ_2007/media/LtHThreaded_zps8de7c401.jpg.html)