Centerfire Barrel Tuners/ Muzzle Devices

[Erik Cortina]

any experience on a skinny, heavy palma, 34in barrel shooting 200-215 ?

No experience, but all barrels react to tuners in similar fashion. Tuners reduce the amplitude of the harmonic wave, thus increasing your accuracy nodes.

 

[Alex Wheeler]

any experience on a skinny, heavy palma, 34in barrel shooting 200-215 ?

No experience, but all barrels react to tuners in similar fashion. Tuners reduce the amplitude of the harmonic wave, thus increasing your accuracy nodes.

How do tuners reduce the amplitude of a barrel's harmonic wave?

 

[Erik Cortina]

any experience on a skinny, heavy palma, 34in barrel shooting 200-215 ?

No experience, but all barrels react to tuners in similar fashion. Tuners reduce the amplitude of the harmonic wave, thus increasing your accuracy nodes.

How do tuners reduce the amplitude of a barrel's harmonic wave?

The link below will illustrate how tuners work.

here is a great article that I just found and would like to share if it can interest some of us:

http://www.varmintal.com/atune.htm

 

[Alex Wheeler]

any experience on a skinny, heavy palma, 34in barrel shooting 200-215 ?

No experience, but all barrels react to tuners in similar fashion. Tuners reduce the amplitude of the harmonic wave, thus increasing your accuracy nodes.

How do tuners reduce the amplitude of a barrel's harmonic wave?

The link below will illustrate how tuners work.

here is a great article that I just found and would like to share if it can interest some of us:

http://www.varmintal.com/atune.htm

Thanks for that link. I was aware that adding mass to end end of the barrel will reduce the amplitude, thats why I think my guns shoot better with a brake. But, I thought you were referring to the tuner doing this somehow, rather than the mass, as your design doesn't add mass to the barrel.

"ADDING A TUNER.... Adding a tuner to the muzzle of a rifle barrel does the following:
1. The additional mass reduces the amplitude of the vibrations.
2. Decreases the natural frequencies by decreasing the lower Mode's frequencies more than the higher Modes.
3. Increases the barrel's vertical end sag due to the extra weight. This would tend to make the vertical plane the preferred plane of vibration.
4. Moves the Mode 2 node closer to the muzzle."

 

[Erik Cortina]

My tuner does add weight to the end of the barrel, but it does not add weight to the entire rifle if it's put on a 1.250" barrel. Also, but moving my tuner in or out, you will move the wave away from the muzzle, thus tuning the harmonics.

 

[johara1]

I had moved in a different direction last year and shot shorter barrels at the same velocity as the longer ones and i think it payed off. I dropped back to 28" and is a HV. contour and with a Harrells brake. The Dasher seems to be the happiest at that length and it makes them easer to balance. Nose heavy gives you vertical……… jim

 

[Erik Cortina]

... Nose heavy gives you vertical……… jim

That's because you don't have a tuner!

 

[GSPV]

Jim, with the Harrels brake, you have a beyond-the-muzzle tuner that isn't adjustable. Might as well take the next step and get a tuner/brake combo

 

[johara1]

Eric, No, the tuner has nothing to do with the out of balance of the rifle. The tuner brake is what i was looking at, The weight was the killer and the thread size was not compatible with what i use and they didn't want to change either. I wanted to test to go from the brake to the tuner after i established a base line with the brake. This would give me a level playing field…… jim

 

[Erik Cortina]

Eric, No, the tuner has nothing to do with the out of balance of the rifle. The tuner brake is what i was looking at, The weight was the killer and the thread size was not compatible with what i use and they didn't want to change either. I wanted to test to go from the brake to the tuner after i established a base line with the brake. This would give me a level playing field…… jim

I'll make you a tuner brake to fit your needs if you want. Send me a PM if interested.

 

[6BRinNZ]

I had moved in a different direction last year and shot shorter barrels at the same velocity as the longer ones and i think it payed off. I dropped back to 28" and is a HV. contour and with a Harrells brake. The Dasher seems to be the happiest at that length and it makes them easer to balance. Nose heavy gives you vertical……… jim

This is the bit that has me interested in a tuner. FTR typically runs long barrels for FPS but that seems counter intuitive to the accuracy requirements.

What I have taken away from varmintAls is that the tuner might be beneficial in more easily achieving a wide accuracy node for FTR conditions while maintaining long barrel length.

My experiences with a suppressor on a .223 is that groups went from good to really good once it was fitted (no load change)...i.e. weight at the end was a large influence. Importantly its not that I just saw smaller groups but it was more tolerant as well.

Eric - I will send you a PM, I'm keen to discuss a little further.

 

[Quest-QC]

This is the bit that has me interested in a tuner. FTR typically runs long barrels for FPS but that seems counter intuitive to the accuracy requirements.

i was reading the same that long pipe are tricky but i decided to still try a long, 34inch skinny pipe to get fps down range. The first round shot in my rifle i could feel the vibration go bbbrrrrrrrrrrrrr.....then i told myself, this is never gonna shoot....well 1/4moa for 15 shots with a 200gr at 2770fps is a good load.

 

[6BRinNZ]

This is the bit that has me interested in a tuner. FTR typically runs long barrels for FPS but that seems counter intuitive to the accuracy requirements.

i was reading the same that long pipe are tricky but i decided to still try a long, 34inch skinny pipe to get fps down range. The first round shot in my rifle i could feel the vibration go bbbrrrrrrrrrrrrr.....then i told myself, this is never gonna shoot....well 1/4moa for 15 shots with a 200gr at 2770fps is a good load.

Yep - I don't think (and I'm not) anyone is saying it can't be done. What I am interested in are the ease of achieving, the width of the node and the consistency. IMO time is the greatest cost with shooting and anything that makes the job easier to develop and maintain a good load adds a lot of value.

If the science says long barrels and accuracy are somewhat opposed then all that means is it might be harder to achieve the goal....but then throw a nice behaving calibre such as the .308 in the picture and the point might be moot.

Some trends have science behind them and others are just good ideas that in the long haul don't add value.....I am curious about a tuner in FO/FTR as it seems to have the science behind it as a starting point.

 

[GSPV]

The RF guys use longer, slimmer barrels to make the tuner more effective. But, it remains to be seen if that carries over to Centerfire.

If the only problem is losing good tracking due to being nose heavy, there are ways to combat the nose heaviness.

One of the things that I like about our sport is that we are constantly learning and refining. It is just amazing what happens when you throw together a few folks and put a piece of wood up for grabs.

 

[ProneKing]

I use, make, and sell tuners for smallbore shooting. Since we cannot tune our loads, we try to tune our barrels. Pretty effective for smallbore, but it does not make a bad gun into a good gun. It seems to make a good gun just a little bit better.

I've never tried it on centerfire. However, one of my Scandinavian customers says he uses one on his 300m rifle and it works well. Most european 300m shooters are kind of in the same boat as us smallbore shooters in that they use either factory Lapua or Norma ammo. Trying to tune existing loads for maximum performance. Looks like I'll have to try one on my 300m rifle too...

 

[broncman]

One of my jobs at work is vibration analysis. There are three main ways of decreasing vibration. Mass, stiffness and dampening. Vibration will have an amplitude and a frequency. The resonant frequency is what the object will resonate at when struck...think tuning fork.

Has anyone coated their barrel in say Linex or Rhino lining type urethane? This would have a very big dampening effect but no added stiffness..

I went to the range today with my 30" barreled Ftr rifle and some steel collars to fit the barrel. Shot 4 five shot groups starting with the collars 1/2" from the end. I could make the groups go from vertical to horizontal and back . I shot several nice groups under 1/2" in windy conditions. Shot several without the collar and they were slightly bigger. not by much but moving the collar definitely
changed the layout id the groups!

I can see the benefits ....so looks like I will be machining a tuner.

 

[JohnMill]

Can anyone post a pic of a Loker centerfire rifle tuner?
Appreciation in advance.

Thanks John

 

[DennisH]

I tried it on a 28" barrel, it works just as well.

Erik,

30" bull barrel, 308, does the tuner greatly improves the groups @ 600yards?

Thanks, Dennis

 

[Erik Cortina]

I tried it on a 28" barrel, it works just as well.

Erik,

30" bull barrel, 308, does the tuner greatly improves the groups @ 600yards?

Thanks, Dennis

It depends on your barrel and load, but if all if right, a tuner will bring the best out of your barrel.

 

[DennisH]

I tried it on a 28" barrel, it works just as well.

Erik,

30" bull barrel, 308, does the tuner greatly improves the groups @ 600yards?

Thanks, Dennis

It depends on your barrel and load, but if all if right, a tuner will bring the best out of your barrel.

Thanks Erik, PM me with pricing info. I will be putting it on a 1" (muzzle) bull barrel.