FX BARREL TUNER

RMAC is coming up soon, we will see what the FX shooters us when big money is on the line.

Now....you're getting it !

There's an age old saying, been around a VERY long time..."monkey see, monkey do".

It works in almost ALL hobbies and even some professions.



Mike

P.S. - Why all the capital letters ? You yelling at someone ?

Even in the PB world tuners are NOT on most guns, they are on true bench rest guns for a good reason. Most of the FX YouTubers are true hunters so zero need for the tuner. 


Thanks to the location RMAC has more to do with wind calling skills as supposed to pure accuracy of the gun compared to locations with more consistent wind. Keith is an amazing shooting who lives on the windy NY plains, can’t wait to see how he does this year. I would not bet against him that’s for sure. 

Upper case letters are no problem for me, actually i was in the 8 grade or so before i stopped using that myself, and only as i found writing small letters was faster. ( this was of course in the paper days in the 70ties ) and the only school work they got out of me was what i had time to do in school, home work i almost never did, and surely not in the older classes at the end of the 10 year long nightmare.

Regarding the barrel tuners, they dont seem to have caught on, i have seen people reviewing them / using them / praising them, but the thing disappeared from their barrels anyway.

My feeling is a airgun was made properly, there would be no need for a tuner, at least for the great majority of shooters.

i bought a tuner for my 177 maverick and found it to be as problematic as positive. Its heavy and causes barrel droop with the stock soda straw barrel it will move point of impact quite a bit with a lw barrel which is quite a bit heavier not so much effect. I think this is why their working on tensioned barrel system but i also believe this is another bandaid as if the tension changes at all most likely poi will change too. Just my thoughts

I have two M3s: 700mm .30, and a 600mm .22

The 700mm .30 didn't seem to have much harmonics present. Changing speeds and even switching between a Sumo and Ronin had almost no detectable effect. Fast forward to the 600mm .22 I am tuning for slugs. It has a DonnyFL FX moderator on it, but when I threw on a Ronin groups shrank by about 0.63 MOA and flyers were almost gone. A different slug liked the opposite. My goal is to get some sort of tuning method that is as close to the original compact setup with the DonnyFL FX mod since the Ronin is completely obnoxious (the size) on this setup. I ordered one of the integrated tuners to mess around with, so will be interesting to see how that plays out.

I completely agree with the observation that the tuner is absent on a lot of gun-tuber's guns. I would prefer to have a forgiving barrel setup that shot well without needing fine tuning. With that in mind, if I had all options available, my prefered order of tuning options would be:

1) tensioned barrel system - stiffer all around for hopefully smaller amplitude on any harmonics to the point they don't matter. Also no sag with heavy moderators

2) moderator that you could add weights either internally or externally. The Ronin for example is completely unnecessary on my .22. Would be nice to get that weight in size of the FX mod, or Sumo.

3) Barrel tuner.



The tensioned barrel system not available for 600mm and not even available as a standalone ad-on (only the end pieces and carbon sleeve) so that I could cut one down. I'm not aware of Moderator with weight system either. That leaves me with an order of lead tape off Amazon, and the FX tuner to experiment with.

I tried one on my Crown. I found it was fantastic at making my gun longer and nose heavy.

"2) moderator that you could add weights either internally or externally. The Ronin for example is completely unnecessary on my .22. Would be nice to get that weight in size of the FX mod, or Sumo"

I was thinking the same thing TDK. Seems like you could do that on the inside of the moderator end cap. Drill and thread about 15 holes all around the perimeter of the cap, like numbers on a clock, so you could add Allen screws untill you hit the "magic" weight.

Kind Regards,

Glenn in Texas

II TALKED TOM A GUY AND HE SAID THE TEMP REALLY THROWS IT OFF

Click to expand...

What's the suspected mechanism for temperature shift? The harmonic tuner just sits on the end of the barrel, even the full integrated tuner is essentially free-floated with the shroud riding over the barrel. The barrel and shroud can move independently during expansion/contraction. Now the TENSIONER on the other hand, that I could see shifting with temp as the carbon tube and steel barrel are locked together.

Well i also see them as barrel pipe tuner, and you are tuning what ever waveform the straw barrel pass on to the barrel pipe, though this is probably most pronounced at the very end.

I see the barrel tension the same, unless it is how the SA boys do it, cuz they as i understand it cut a thread in the straw barrel and tension the barrel, where as others including FX them self tension the barrel pipe with the straw barrel sort of "floating" inside.

Actually if you tension the pipe too hard and stretch it the actual barrel inside might be able to rattle back and forth, as a substantial pull force would probably have little stretching effect on the end pieces of the barrel pipe that hold the barrel itself.

But ! what ever rock your boat, or tighten your groups.

I really wish someone would take a deeply scientific look at these things, other than putting it on the rifle shoot it at the bench and clap their hands with joy.

I tried the barrel tuner on a three different FX guns with different tunes and twist rates and pellet/ slug weights. I did not see any improvement in groups after hundreds of pellets. What worked best was a shroud clamp and a ok tune (user milage will vary). I put the tuner away and there it sits. The barrel tension system I think will be better than the weighted tuner, but still will cause issues for people that don't get their tension right each time they remove and reinstall or have movement while hunting. I think the tuner is the way of the dodo. I think FX knows this when they put out the tension system. They basically made an product obsolete. I think the caveman way of tension of a shroud with an old fashioned clamp will ultimately prevail with less money, new / fancy is not always better. Sure it looks better with the new tension system but the clamp in the end will be the winner I bet. I just want the aluminum shrouds to go away, give me a better material for heat and cold absorption. That's what will truly help POI consistency for me. I will most likely have a clamp made the for the tension 800mm barrel/shroud. 

I do think the power block stuff is a winner. We all know more air needed to go through these impacts and now its promising more speed with less internal shock at high pressures. Could be really interesting on a .35. The MK2 .35 didn't really interest me till this power block system came out. Now I want to try it eventually. Definitely think 800mm is also good for all the gun calibers. Least we now have the option to run lower regs for faster slug speed. I will change out my impact to 800mm to keep reg lower for less creep and stiction (hopefully). Get speed with more harmony. More power / air pushed per shot I find my FX guns to be more and more "fragile". I want a hardier impact. Wish list... I am getting tired of FX prices and having to "polish" and rebuild imperfections in amp regs for a $2000 plus gun. Finding it to start to become unenjoyable at times after a few years of doing it. Don't get me wrong I enjoy tinkering, but I do like a Uragan / LCS / Air Arms / Crickets / RTI / EDguns for the simplicity. At times, there is just many be "too much tuning". But I am a hunter and I don't bench shoot unless I am tuning and setting up Strelok. My tunes are not perfect in any means but I am happy I can at least get a basic set up and work to be better with experience. So my experience is not like you pros that do the shooting comps. I know my ability and understanding is much lower then yours. Always learning. 

BTW thank you for that, I always love getting on here and learning something new from you very talented people. 

RMAC is coming up soon, we will see what the FX shooters us when big money is on the line.

Click to expand...

IM SURE THE NEW 800MM WITH TENSION WILL BE RUNNING GREAT LOTTA TESTING WENT INTO THT THING I THINK THE BARREL TUNER IS OUT THE DOOR WAY TO MUCH FUSS TO GET IT TO WORK. I TALKED TOM A GUY AND HE SAID THE TEMP REALLY THROWS IT OFF

Click to expand...

Hi, the 800mm tensioned barrel is 1:14 twist and designed for heavy slugs. FX could make a custom 800mm barrel for pellets or an tensioned 700mm barrel for RMAC. 

I've done a quick tune on my MK2 for 34 gr slugs @1000fps with decent consistency. Tested it out at 30 meters. Gave me ok(ish) groups of around 10mm ctc. My idea was putting on the barrel tuner afterwards to get the last bit of accuracy for sub moa performance (which I've gotten before with the right tune with no barrel tuner) but it only made it worse. 9 moa barrel droop and nowhere as good as with the standard shroud. I've seen videos of using them for pellets but maybe not with heavy slugs, higher reg pressure and the fuzziness of them. I'm gonna stick to the old way of tuning from now on. Maybe removing the tuner weight and just use the cf shroud.

douger said:

IT SEEMS TO ME YOU DONT SEE MANY OF THE TOPFX GUYS PLAYING ITH THE BARREL TUNER. THINKING THIS WAS JUST A FLAW IN DESIGN, MAYBE TEMPS ARE CHANGING THE POI. SEE LOTTA FX GUYS SHOTING BUT REALLY NO TUNERS ARE ON THE GUNS, DONT SEE THE SOUTH AFRICANS EVER USE THE TUNERS EITHER, JUST WONDERING WHAT WAS THE HYPE AND NOW THEY SEEM TO HAVE DISAPEARED

Click to expand...

Why you always yelling? haha