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.