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Barrel Tuners

The barrel tuner application for airguns has intrigued me for some months, I have seen them widely used in .22rf Benchrest so thought they would be effective in airguns? I to have 2 RAW BM’s. 

So here are my thoughts, trials, and tribulations, first using the worst performing pellets for each gun I made and used a real simple heavy delrin type of sliding weight that I put at the very end of barrel “actually overhanging the ported shroud and moving it back towards the action at maybe tenths at a time?, I didn’t see any improvement over the best performing pellets that I use in competition.

The whole reason for the tuner in my case was to be able to use the poor performing pellets and have them shoot as well as the best performing.

So to get to the point I thought it was probably a waste of time that I can’t afford to make for the negligible benefits it produced? Maybe others will have better luck or make a more sophisticated tuner or different barrel arrangement that works? 

On a side note fx is really pushing their version right now, but I really find it hard to be truly effective with their multi layered sleeve, barrel shroud arrangement?, but with that being said I’m not a structural or molecular composite engineer either.
 
Joe, your findings on tuners for pellet guns is similar to my own. I have not yet seen a good pellet gun with a tuner outshoot the same gun without one. Low power pellet guns simply do not produce the recoil impulse that will create the vertical stringing problem.

Slug guns, Rimfire, and centerfire are a different matter.

Mike 

 
Thomasair and nomojo65

I am with you guys up to 90% the rest of it is my theory pointing to a third direction. I have not tried with airguns - yet. But I was using it in my competition archery time. A very Long story short...look up the old style doinker quadraflex stabilizers, those had a "tuner" early as 2002-04.

Need a soft rubbery compound with heavy metal powder (brass or cast iron grind down to a powder the size finer then a espresso coffee powder) casted in a shape that can slide in and out on the barrel, but not heavy enough to pull down the barrel.

I am not talking anything about shroud, me perso ally I am removing it anyway when shooting at 100. Bare barrel here but to solve the rigidity I was thinking to rework that shroud in my next project


 
I have mostly avoided harmonic barrel tuners, since i prefer a stiff barrel of 16mm or more, and my airguns dont tend to recoil much, but sometimes one does help improve a barrel that isnt QUITE as good as it can be. I began experimenting with tuners on airguns in the eighties, and found MID-barrel tuners a bit more useful than muzzle-mounted ones … but either can improve accuracy to a degree if done right (its much easier to wreck accuracy with one though, so patience and reason is required).

Barrels can sometimes take a lot of effort and testing to wring the desired result, and once in awhile I have found I could get it to do well with a tuner added … esp on a more powerful gun shooting a bit faster than it “wanted to” without the tuner, I discovered this by trying to get accurate 10M rifles to shoot well at three times the speed they were designed for.