Exactly what i am saying.
If Impact barrel were floating it would be more and more accurate i think.
Maybe i am wrong....who knows.
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FX Impact barrel support concept
- Thread starter JamieUK
- Start date
Exactly what i am saying.
If Impact barrel were floating it would be more and more accurate i think.
Maybe i am wrong....who knows.
Dont mince your words now GQ....just say it as it is
LOL.Just to clear things up it is my belief (and experience from a badly fitted stock on my Tikka .243) that-
It is only 'best' to have a free floating barrel when having a fixed barrel will cause a problem where it is likley that barrel heating/ and or enviromental changes can cause the barrel or forend to expand/ retract/ create unwanted contact against each other that results in an unwanted POI shift.
This is of course possible on an airgun with a wooden/ laminate/ even composit stock, but not on an Impact.
The one place where you may potentially see materials contracting against each other on the Impact is inside the barrel/ shroud (note- my crazy, off the wall, revolutionary, brand new invention- that I shall call 'a barrel band'
has an intergrated 28mm oring for the barrel support allowing for expansion)As Heavy has pointed out, FX have already put different materials/ alloys together and then put them under tension no less... which should possibly be of greater concern.....
As pointed out by Mercado, in reality, for 99% of shooters a free floating barrel on an airgun doesnt make it more accurate.
GQ- I generally only hunt, so for me a vunerable free floating barrel has disadvantages compared to a correctly supported barrel
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Thanks Mercado, a positive response!
Due to corvid 9, and also mixed feedback
, ive decided to halt mass production for now....but if FX buy up my design for use on their 800mm barrel, ill make sure they send you one (assuming you have an Impact!).... free of charge 
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The liner is under compression... tension would be a good thing since it dampens vibration. Compression is bad because it amplifies vibration.
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Ok, in that case the barrel/ sleeve must be under tension as it carries the threads/ is the opposing force against the liner....
Either way you have different thickness materials, id assume made from different alloys, under opposing forces that in theory will expand/contract at different rates to each other ....
Probably negligible, but will surely have more effect on accuracy than a shroud passing through an oring....
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I kinda tried the same thing. After converting my 600mm 25 to a 700mm with plans for an extension I found here I machined a tube to cover the now exposed barrel tube. I o-ringed the id and the ends and put it in a slight compression between the trigger block and the end of the barrel cover. Not enough to overcome the set screw at the back, but hopefully enough to help with the poi change. 
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