Pros and Cons of a Barrel Tuner

Written by Sierra Bullets Product Development Manager Mark Walker


Some people love tuners and others hate them. I use them on my rifles and I’ve had more than one person ask me why on earth I would put one of those things on my barrel. I’ve even had a national long range champion tell me to unscrew it and throw it into Lake Erie on my next trip to the pits at Camp Perry. However, there are other shooters that swear by them and have many match wins to back it up.

It’s an indisputable fact that tuners do have an effect on a rifle’s accuracy, however how much is somewhat open for debate. The large heavy target barrels that we use for benchrest or f-class may not be affected as much by a tuner as a lighter weight sporter type barrel. Each barrel that I’ve installed a tuner on not only showed improvement in accuracy but also displayed a wider load window. The increased accuracy is because of the ability to adjust the tuner to the load, however I believe the wider load window is due to the added weight of the tuner slowing down the barrel vibrations. These are both very important aspects of having a very accurate rifle.

While better accuracy and a wider load window are two areas of improvement, I believe the most important feature of a tuner is the ability to adjust the tune during the middle of a match. This is especially important during matches where you must load all your ammo earlier and cannot make adjustments to the load during the match. If you happen to miss the load, instead of having to deal with a gun that isn’t shooting you can make an adjustment to the tuner and hopefully improve the accuracy of the rifle.

While I’ve laid out several ways that a tuner can help, there are also a few ways that tuners can cause problems. They add weight so if you are shooting a discipline that has weight limits on the rifle, you may not be able to install a tuner and still make weight. Sometimes, a barrel just doesn’t show improvement with a tuner installed. These are few and far between, but it is something to consider. If you make an adjustment to the tuner in a match, you need to make sure you move it in the right direction. Adjusting a tuner in the wrong direction can cause very large groups. And finally, if they aren’t tightened properly, tuners can come loose during firing which will cause a lot of problems as well.

As you can see, tuners have both positive and negative aspects. In my personal experience, the positives far outweigh the negatives so I will continue to use them on all of my competitive rifles. If you’ve been thinking about installing a tuner, hopefully some of the information that I’ve presented will help you make an informed decision.

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3 Responses to Pros and Cons of a Barrel Tuner

  1. Ron says:

    Betcha I know who told you to “throw it into Lake Erie”. No names but initials MT.


  2. Walter Martinez says:

    I think the real issue is barrel vibration. That’s why it has less effect on heavy barrels. I get sub moa groups from a stock model 70 because I tune the load to the barrel not the other way around.


  3. Gerry says:

    I smile EVERY time some “expert” tells me tuners are junk. They either don’t know the tech behind a tuner, or they are concerned you are going to beat them with it. A “bull” or heavy barrel is like a standard weight barrel with a heavy tuner installed. The added girth of a bull barrel, along with heat dissipation, just slows the harmonic travel which widens the window to hit a node easier….which is what a tuner does as well right?! Don’t tell an “expert” that….cause tuners don’t work!…pfffft…:)


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