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Barrel harmonics in plain english

That's a good way of describing what's shown in the video and Chris Long's model.
The problem with the practical application of Chris' theory is the input for his predictions is only barrel length. All the worked examples I have seen of barrel harmonics have shown that both length and barrel profile have a significant impact on a rifle's harmonics. There are tons of smaller factors as well that make predictions extremely difficult. That's why rifle harmonics are a get the rifle to act as consistently as possible and just test it to see what it is doing kind of game for the most part.

Unless those different barrel timings indicated by Chris' theory represent different barrel profiles (which actually might be the case) the practical application of his theory ie. the predictions it makes are basically useless.
 
Many on the Site do not remember when you could not use tuners in NBRSA and IBS Short Range Benchrest.

myself and a couple of other shooters were instrumental in getting tuners approved. I believe Dwight Scott was one of the first to come up with something.

I came up with the aluminum one piece, threaded on the barrel with a 36 tpi thread, and clamped. I then thought about incorporating some type of rubber.dampening device that would act as a buffer.

It worked. I ended up with a tuner that weighed about 5 ounces with a hard rubber marine bearing pressed on tight.

Gene Bukys came up with his design, and sold them. He always believed that a tuner simply allowed you to get as much out of a barrel as it was born with. He also believed that the “buffer” gave you a wider tune window. What it won’t do is make a mediocre barrel into a great barrel.

This is the original tuner I made years ago. I use it to fine tune after the load is right. If the Rifle seems too sensitive in the horizontal, I can adjust the tuner to get a tad of vertical, or Vice-versa.

I never got much into exactly what the tuner was doing as it relates to this discussion, all I know is that they work.

Back when we first proposed tuners to the NBRSA, there was quite a bit of opposition. At the Nationals in Raton when it was presented to the members for a vote, one very well known shooter took the microphone, looked straight at me, and said……“most of us wish you would just go away”

We didn’t, and the rule was adopted.

Since then, different people have come up with some very well thought out tuners.
this is my first tuner that I have on my 30BR VFS Rifle. In the picture, you can see some of my other designs on other rifles.
79616F88-9741-4C71-9D75-E2AB561758B9.jpeg
 
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Dwight Scott’s tuner incorporated a threaded device clamped to the bottom of the barrel and then a rod was run through the threaded attachment and this moved weight fore and aft.
 
Many on the Site do not remember when you could not use tuners in NBRSA and IBS Short Range Benchrest.

myself and a couple of other shooters were instrumental in getting tuners approved. I believe Dwight Scott was one of the first to come up with something.

I came up with the aluminum one piece, threaded on the barrel with a 36 tpi thread, and clamped. I then thought about incorporating some type of rubber.dampening device that would act as a buffer.

It worked. I ended up with a tuner that weighed about 5 ounces with a hard rubber marine bearing pressed on tight.

Gene Bukys came up with his design, and sold them. He always believed that a tuner simply allowed you to get as much out of a barrel as it was born with. He also believed that the “buffer” gave you a wider tune window. What it won’t do is make a mediocre barrel into a great barrel.

This is the original tuner I made years ago. I use it to fine tune after the load is right. If the Rifle seems too sensitive in the horizontal, I can adjust the tuner to get a tad of vertical, or Vice-versa.

I never got much into exactly what the tuner was doing as it relates to this discussion, all I know is that they work.

Back when we first proposed tuners to the NBRSA, there was quite a bit of opposition. At the Nationals in Raton when it was presented to the members for a vote, one very well known shooter took the microphone, looked straight at me, and said……“most of us wish you would just go away”

We didn’t, and the rule was adopted.

Since then, different people have come up with some very well thought out tuners.
this is my first tuner that I have on my 30BR VFS Rifle. In the picture, you can see some of my other designs on other rifles.
View attachment 1313275
Have those wheel wells been altered ?
 
Where there's a will, there's a way. I have a Harrell tuner buried
away in one of my Kennedy's. One of these days. I keep telling
myself.

And talking about tuning......What's under the hood of your Malibu ??
 
Pay attention to the forearm. I swear I can see a ripple travelling down it just before the muzzle flash...
View the video from YouTube instead of the posted link. Go to the three dots, upper right corner, select Play Back Speed 25%. What looks like forearm distorting is a affect from the wake of heat distorted air from the ejected hot cartridge case. Also there is the video resolution which is kind of mediocre. The amount of barrel flex is right there with the best AK47. If that rifle was full auto, the vertical dispersion at 100 yards would be six feet. I believe the M1A accuracy would benifit with the conventional stock with barrel and op rod tube held in place by barrel band, attached to the stock. Best with a synthetic stock. This SOCOM version, the barrel needs to be supported. Also. Watch the charging handle/op rod that when it cycles forward into battery, the barrel flex will increase momentarily. Another thing to watch is it appears that the flex’s is a up and down motion, not a circular oscillation. If so, the gas tube and op rod are the influence.
 
.00125 seconds on the average, anything after that time doesn't matter. That's why several of the major calculated frequencies are of little consequence, except interesting discussion.
 
That video is seriously flawed for the fact that you have
a bolt being slammed forward by it's return spring system.
There would be less movement if the bolt was captured
by an empty mag. Any auto firearms should be excluded in
the conversation..
 
Have those wheel wells been altered ?
Yes. When I originally did the car back in 1992, I had the rear wells flailed for tire clearance. And to give it a different look.
I have reincarnated my car several times. I kinda have a saying that says that I‘m on a quest to spend $400,000 to have a $40,000 car.FBA1C869-144F-47BD-8CF4-6738B178AD27.jpeg
 
Dwight Scott’s tuner incorporated a threaded device clamped to the bottom of the barrel and then a rod was run through the threaded attachment and this moved weight fore and aft.
I think Dwight’s idea was a great, but I can’t ever remember seeing one on the firing line.
 
I saw two, Jackie. One was on Dwight’s rifle and the other was on Dick Wright’s rifle, Fugly. At that time I did not have a tuner and I watched Dick closely as he moved the rod back and fort at a score match at Harrison.
The rifle seemed to respond to tuner and condition changes but it was reacting to these changes in a negative way. Later Dick told me he talked to Dwight and Dwight told him he was adjusting the wrong way.
 

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