If you don't use lot tuned ammo, don't bother to play the game. I sent my 22" Vudoo in for testing and it didn't care for Midas +.
I had them try cheaper Center X and that worked well . There is a huge difference (.62") between lots of ammo even within the same type.
If / when you try a tuner I would test out the EZELL
http://www.ezellcustomrifles.com/home-3/pdt-tuners/ I have no experience
with the Ezell and no connection with Mike but the reason for my suggestion is this: The Ezell and Harrel are nearly identical to look at
and both function in similar ways. They clamp to your barrel and a rotating mass can be moved toward you or away from you to alter harmonics.
At the Ezell web site you will be directed to a very fancy abstract about the PID / PDT technology that he has incorporated.
You likely wont understand the abstract past the third page but it will be impressive. I took it as pure sales BS and looked deeper.
After a fair amount of investigation about PDT and looking at his product prior to assembly and various emails of Mike refusing
to answer some direct question, he by accident gave me the one piece of information that leads me to believe that .......
His tuner has at least the minimum required to gain the advantage of any sort of PID / PDT technology. Both are about $160.00
I would not start with any tuner but I don't see that you have anything to loose trying the Ezell over all of the others.
There is a thin plate on the Ezell that covers 9 holes and if you took it off and dumped out the material, you would basically have a Harrel.
In the end most of your results will be because of you, both good and bad.