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Barrel Tuner: talk to me about it!

Can anyone talk to me about these things? I dont know much about them.

Also, how do you set it up in your rifle, meaning after it is installed on the barrel? Do you develop your best load and then tweak the tuner to try to get better accuracy? Or is this thing to be used during different temperatures?

I am lost on this one
 
This has been beat to death several times. My suggestion is that you do a search here and on benchrest.com. One thing though, many of us who use tuners don't agree on everything, so even when you see all the opinions you will still have to make some decisions for yourself.

Rick
 
gilmillan1 said:
Can anyone talk to me about these things? I dont know much about them.

Also, how do you set it up in your rifle, meaning after it is installed on the barrel? Do you develop your best load and then tweak the tuner to try to get better accuracy? Or is this thing to be used during different temperatures?

I am lost on this one
Like Rick said...replies will vary somewhat. I think there are different reasons for this. One is that all tuners are different. This in itself creates some confusion when discussing tuners generically. For example..So and so says he moves his tuner 1/4 turn with his 4 ounce tuner to make fine adjustments on his rifle with a 20" 1.250 straight contour barrel. The next guy says that's too much....and he only moves in very small increments, but has a different barrel length and contour..as well as a 8 ounce tuner, etc....
Both may or may not be true and accurate statements.
I think the best thing to do is to be very methodical in testing and tuning with them. Don't make big adjustments until you PROVE that it takes those types of movements with your tuner, on your rifle. Also, there's so much conflicting info on HOW they do what they do.


One thing is for certain..they're much easier to use than to explain how they work.
I offer anyone the opportunity to come to my shop and see how I use a tuner. If you don't have a pretty good idea of how to use one when you leave, I'll buy lunch. It's so easy that anyone can do it. It's just much easier when you can see how it's done by the person or company that makes it.


Tuners all work on the same principle. Some are better at doing it than others, but they all accomplish the same thing, but with varying amounts of movement.
There are also those few that use a tuner but never move it. The reasoning here is valid as the mass on the end of the barrel does offer some benefit, by itself. The benefit is a wider tune window..one that is less sensitive to changes in temps, etc. It is my belief that this is leaving the best part of a tuner on the table..That being the ability to keep the gun in tune with a small adjustment, even while at the firing line. Bottom line here is,do what you're more comfortable with..tuning by traditional powder charge/seating depth methods or by nudging the tuner. Me..I'm a lot more comfortable moving the tuner. I use to do it the other way around, like most people. That said, I don't remember the last time I didn't go to a match pre-loaded but with a tuner. I've never felt like I lost because of a tuner but I do feel like a tuner has helped me win.


In summary...I think it best if you test a tuner the way the maker suggests, first. Beyond that is up to you, but taking bits and pieces of info and applying it to something that the people so generously offered help with, but have no experience, is asking for failure.


IME, tuners don't make a gun shoot smaller than they would if they were perfectly tuned by traditional methods, but they will help get whatever your equipment and a given load has to offer, from it. They will also maintain good tune in lieu of traditional tuning and make tune windows wider and more forgiving. Yes, tuners do work!
What they won't do is fix a bad gun or a missed switch in conditions.---Mike Ezell



Oh..as for getting started with one...
If you have a known good load, go with it. If not, I suggest working up loads as normal, with the tuner on the barrel, but don't move it at all during load development. That would be equivalent to changing two things at once..never a good thing if you want to know what did what. Remember...and I'd probably put this above everything else I've ever said about tuners..That 's to be very methodical about it. Don't grab it and give her a couple of rounds and a half, when literally a couple of thousandths of an inch was all it needed.
 
A lot of guys are full of bs when it comes to tuners. Mike (gunsandgunsmithing)is the most knowledgeable guy I have spoke to on the subject. I believe, he just might actually have a grasp on what they actually do ;) Give him a call for the straight answers. We are eventually going to get around to testing one of his, if he can ever keep one in stock.
 
wait a minute, a you saying you can just pick up a known load and tune it with the barrel tuner? without adjusting powder charges and seating depths?
 
gilmillan1 said:
wait a minute, a you saying you can just pick up a known load and tune it with the barrel tuner? without adjusting powder charges and seating depths?
Yes, but picking a known GOOD load is not the same thing as just randomly loading anything. That said, a tuner will allow you to get all of the potential from either...including the random load. Some people feel that you can take a load that is a common starting point load for a given cartridge. .such as 29.0 grains of N133 in a 6ppc, for example, and tune it with the tuner. It does happen that way sometimes but I much prefer we be more methodical about it. If you're lucky enough to have that work for you...GREAT! Remember, tuners allow you to get whatever a given gun and load have to offer from it but it won't fix a bad load, gun or shooter error. It's really not much different than loading to the condition with powder charge but with a wider tune window and doing it with a nudge of the tuner instead of a trip to the reloading press.
 
gilmillan1 said:
wait a minute, a you saying you can just pick up a known load and tune it with the barrel tuner? without adjusting powder charges and seating depths?
We have 9 Dashers all shooting the same powder & charge with different primers and seating depth. That all have ben tuned with a tuner.
No rim fire match is won without a tuner They have to shoot fixed ammo . The ammo they shoot is designated by speed. With aid of a tuner the can adjust the nod point for a tune.
Center fire is no different they tune just like fix ammo guns do.. Same pattern on paper both guns . Tuning a load you will find the tune is where vertical and horizontal peak together. If you watch the pattern on paper there is 4 tune areas in a tune. If your bullet impact is set dead on at 100. you will find 4 different impact from the point of aim. Top left top right bottom left and bottom right. I like mine to be tuned in the upper right point of aim For me it gives me the widest tune area.
Without a tuner I never would of found how The bullet moves around the point of aim.
With knowledge I have learned how to adjust my tune for condition and weather changes And different temp.
All tuners does the same thing. But if a tuner can't be move without repeat ability it no different then tuning with powder drop seating depth neck tension .
The last 5 years I have ben testing tuners.
Short range ben rest have ben winning with them.
If you will go to the Daily Bulletin John Pierce with F -TR rifle You will see three guns With RAS tuners on them.
You can also go to Bostrom Gunsmith They have a few pictures and write up on the winners that use them.
Larry
 
This might be tantamount to pulling the pin on a grenade and giving it a toss... but can someone give a cliff-notes summary of the functional difference between say, tuners from Bostrom, Cortina or Ezell?
 
memilanuk said:
This might be tantamount to pulling the pin on a grenade and giving it a toss... but can someone give a cliff-notes summary of the functional difference between say, tuners from Bostrom, Cortina or Ezell?
Weight, length, thread pitch and size, position relative to muzzle, attachment specifics and aesthetics. Some use something to manage vibrations better than a solid mass..such as rubber, or in the case of mine, particle dampening in the form of tungsten. I won't get into which is best or why here. I do have some good research info on my site. ---Mike
 
gilmillan1 said:
Would u say it is easier to develop a load with a tuner than with the traditional methods?
Not as much as you'd think. The best load in a given barrel still is just that...better than the rest. So load development doesn't really change that much and I don't move the tuner while making changes in the load. That said, a very good load is easy to find if you go about it by the method mentioned previously of starting with a known good load and using the tuner to bring it to its best in your gun and in the given condition.
 
...I'll continue and try to clarify what I mean in my last post by giving the example that most of us are familiar with. Say your gun shoots great at 3000FPS and a certain powder. You try anot her similar powder at around the same speed and the best you can make it do is not bad but not good enough...or as good as your go to powder.A tuner won't always fix that. It will allow you to take a given load and adjust the tuner to get the gun to shoot that load as well as it will.
 
Mike,

I'd perused the paper listed on your site, and am re-reading it... but honestly, making the leap between particle size and count, and functional use in a barrel tuner is where you're kind of losing me.

Monte
 
memilanuk said:
Mike,

I'd perused the paper listed on your site, and am re-reading it... but honestly, making the leap between particle size and count, and functional use in a barrel tuner is where you're kind of losing me.

Monte
It's addressed in the research done at Texas A&M but I experimented with several to confirm what I concluded from the research carried over to this application well. Suffice it to say that tungsten is very expensive. ..if I wasn't convinced that it's worth it, I most certainly would use something less expensive. Oh..another thing that my design allows is easy weight adjustment...but let's save that topic for later.
 
I have tested the Cortina and the PDT tuner (Ezell). I shoot fclass and only use 32" straight 1.25" barrels. I methodically work up my loads and finalize with the tuner. The end result is the same for both tuners. The only difference I see is that the PDT ads weight and the Cortina does not ad extra weight. If you compete and are limited in weight and you are on the edge of weight go with Cortina. If you are under weight and have some to spare the PDT is nice!
 

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