1. By far the best test yet by repeating and backing up shots. 2. Your machining skills and strive for absolute perfection and precision  is definitely .01% of the best out there. Well done young man.

Holy shit. Why would anyone want to tune a rifle that shot that well previously. Madness.

Browning I beleive invented these tuners with their Boss system.  I have a couple of rifles with the boss system installed one just turns the dial on the Boss system to adjust barrel harmonics for specific ammo.  They discovered the idea when they found that frequently just trimming a small piece of barrel off cured inaccurate rifles by changing the barrel harmonics to put the wave node at the tip of the barrel.

I think the tuner was very efficient in transferring money from the rifle owner to the tuner seller. It doesn't show in the groups, but it's very evident between the lines. Nice machining work on the barrel: that (the machining) looks like it was worth the money.

I am setting up a B14R  stock rifle just as a training rifle. Not shooting competition .
But still like to be as accurate as I can.
You gave me some food for thought.
Ammunition testing first. Then invest in a tuner.
Thanks

Great info.. this has been my experience with tuners as well! I can guarantee my next rimfire barrel won't have muzzle threads ;)

first video i saw of you ! but the best video you can find on internet about tuners , you know what you’re talking about , very good explination and shooting , hope to see more of you 👊😉👍

I am a Vibration Analyst and will give the short version of some explanation.  The bigger more rigid barrels would require a heavier tuner in order to change the natural frequency of the barrel enough to positively affect barrel harmonics.

Quality barrel and quality ammo is a very good start!

Really appreciate you taking the time to test and share your results… Still saving my $$$ to order a rifle from you!

I just installed a Harrells tuner/brake on my Rem. 700 223 20" barrel and after adjusting the tuner 14 times I got 3/8" groups compared to the 5/8" groups I got with just a brake on it. My barrel is .860 dia. shot @ 100 yds. sirerra MK 69 gr. @ 2800 fps.
Now I have changed a factory barrel into a precision barrel for $145.00 CDN. A Bartlein barrel and milling costs would have cost about $1500.00 CDN.
I've shot it 3 times now without adjusting the tuner/brake and it appears to be holding plus the weather has been the same.
Personally I think this is where a tuner/brake really shines.
Today shot again and adjusted the tuner to other settings and then back to the best setting and again 3/8" groups. By the way the Sierra 69gr. I shoot the barrel loves them and I have shot over 2k rounds in the last year with about 6 other makes of bullets so you're right about having ammo the barrel likes first.

Great information as always. I have a rifle on order from you and you already answered the question I was going to ask. Thank you so much for taking your time from your busy schedule to keep us informed. I just love your videos.

Wow I am glad I listened to you guys for my Full rifle build that you are doing for me, Rim x and not getting a tuner  just you building with  the best possible components and your workmanship.   😊

.22 and that massive of a barrels i would not expect much. I would expect something on thinner higher caliber barrels.

i done the same thing on my factory bergara barrel and had the same results was not repeatable at all and it was tested ammo that my gun loved good job Kenny

Nice rifle I would say without the tuner because the other rifle it’s shooting great without it thanks for sharing

Thanks for that content. Helped me a lot!

thank you for your honest reviews

Is exactly what I was looking for this info is very helpful thanks

Great info and video, Thanks.