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Advice EV2 Barrel - To float or not to float ......

Discussion in 'Anything Airgun Related' started by jps norton, Sep 14, 2014.

  1. jps norton

    jps norton One Hit Wonder

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    Have any of you guys floated your EV2 barrel?

    I would be interested to know if you have and to what result.
    I would be equally interested in reasons for and against doing so.

    Thanks in advance :up:
     
  2. metalman

    metalman Very Active

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    A floating barrel is supposed to help with the "harmonics". Have been told, even HW 100 could have a floating barrel
     
  3. stevemandm

    stevemandm Honorary Member

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    not got one, so the answers no i havent (would love one tho !). the only barrel that i would fully float would be one like the ultra or another short barrelled carbine like the scorpion or hw101 - substantial diameter and short. in my opinion, the barrel band is fitted for a reason - protection and stability, so if you remove this, its susceptible to knocks. i understand your reasons for wanting to fully float the barrel, but there are a couple of compromises that you could make if you want to. firstly you could change the o ring in the barrel band that fits round the barrel, for one that compresses less, so is only just in contact with the barrel (this would make it 'semi floating').you may have to experiment with the o ring size to do this. secondly, you could remove the same o ring completely and refit the barrel band. this option may be best, as the barrel will be floating, but the band still offers protection against knocks. imo, any long barrel should be supported, especially if it has an air stripper fitted
     
  4. mattyts

    mattyts Donator

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    I think Cloverleaf did a similar thing to his S400 and fitted an oversized barrel band with no o ring to give a 1mm gap between the band and barrel.
     
  5. dave goodall

    dave goodall Donator

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    The ev barrel should take to been floated no probs isnt it around the same dia as the theoben barrels like the air arms 200 at 15 mm dia more than enough stength there to float the added bonus of floating out weighs the bands ect if your barrel is thick enough could never understand why daystate didnt float there barrels it would take away alot of there accuracy probs regarding poi shifting when filling the buddys this been the main reaon why theoben floated there barrels even tne 24 inch ones ;)
     
    Last edited: Sep 14, 2014
  6. cloverleaf

    cloverleaf Honorary Member

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    Some stuff what I did write on another, similar thread:

    IIRC the MPR barrel is the same diameter and length (and arguably even the same unit) as that used on the EV2; so I'd suspect that good results on an MPR to transfer to the EV2. Here's a link to my post in the gallery; which contains a few pics and links to other groups shot with the MPR-alike.


    IMO the fact that airgun manufacturers still anchor their barrels at the breech end illustrates just how little they know about their chosen art. IMO barrels fixed in this way are all kinds of wrong for two reasons:

    1. The barrel is invariably fixed to something that's likely to move. In most cases this is the air cylinder; which while being significantly stiffer to the barrel, is also subject to far greater internal forces as the pressure inside it changes; causing the tube to lengthen and shorten with variations in pressure. Worse, if the tube wall isn't 100% uniform, its end will deflect radially as well - effectively meaning that the barrel is pointing in different directions at different reservoir pressures.

    Potentially worse is the practice of attaching the barrel to the stock - a wooden item that's likely to swell, shrink, warp and deflect with changes in temperature and humidity; as well as possibly moving depending on how the gun is held. In this respect the setup on the HW100 is an absolute lash-up, and my heart sank when I first saw the barrel band setup on the FTP900 - yes, it's a beautiful piece of machining, but attaching the barrel to the stock and hanging all manner of superfluous and needlessly complicated crap off it (2-piece shroud) is going to be a recipe for poor accuracy and zero shift. Surprise, surprise - what's one of the major criticisms that's significantly holed the sales of the good ship FTP? Zero shift.


    2. Harmonics. I'm a little dubious of barrel vibration principals being applied to PCP airguns, since the forces involved upon firing are orders of magnitude lower than for firearms and I'm yet to see any proof that PCPs are influenced by barrel vibration. That said IMO there's still an argument for investigating them and minimising their potential to influence the rifle's accuracy. Any secondary (after the breech) point of anchorage on the barrel will affect the way it reacts to vibrations. Most PCPs use an O-ring as an interface between the barrel and support; which at least offers a damped and consistent joint.

    Worst of all in this respect IMO is the barrel band setup on Daystate rifles - be they 30yrs old (Huntsman Mk1) or brand new (Huntsman Regal), the barrels are still held inside a band that relies on a sloppy and inconsistent metal to metal fit.. sometimes it rattles, sometimes it's a tight fit.. sometimes the band pulls the barrel to the left, sometimes to the right, depending on how tightly the cylinder end plug has been screwed on. This issue is compounded on newer, shrouded rifles by the inadequate and complex shroud design. The only consistent features of the design are its inconsistency and the fact that it's an absolute bodge :down:


    I really don't understand why manufactures still insist on adding cost, complexity and inconsistency into a design when the best solution is to fit a fully floating, decent weight (16mm dia) barrel; and bang a 1/2" thread on the end while they're at it. As much as I dislike BSA products, IMO this is one area they've got absolutely spot on.


    Anyway, back to the EV - I'd strongly recommend that you try floating the barrel and run a proper test to find out for yourself - if your experiences are anything like mine, I suspect that you'll be pleasantly surprised :)
     
    Last edited: Sep 14, 2014
  7. dave goodall

    dave goodall Donator

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    As always cloverleaf a great explination to the situation :up:
     
  8. milek

    milek Honorary Member

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    My EV2 is floated and accuracy is spot on.
     
  9. gasman

    gasman Up a bit,,,,,,,

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    They are sort of floating any ways, but I did my ev2 , stangely it caused a small amount of muzzle flip, very slight flip but got used to using it, pellet on pellet still
     
  10. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

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    I think with ev2's if its shooting ok leave it be but mine is floated and my next one will be too ;)
     
  11. jps norton

    jps norton One Hit Wonder

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    Thanks for your input guys :up:

    The reason I ask is because this has come my way after a lengthy drive!!

    View attachment 103626
    And has come with a floating barrel, unfortunately without the original stripper / anchor mech.

    Scoped it today and quickly checked the power.
    Did a 10 shot string through the chrono - 779-782!! Only a 3ft/sec spread :eek:.
    Happy with that, now I just need to zero and range it :cool:
     
  12. XTX

    XTX Donator

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  13. milek

    milek Honorary Member

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    There is an original EV2 muzzle brake/stripper on the bay at the moment if that's what you are after Lee
     
  14. jps norton

    jps norton One Hit Wonder

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    Yep ..... It`s in my ebay watch list just in case. Thanks Mick :up:
     
  15. nick2

    nick2 Keyboard Hero

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    Here's a photo that I lifted off the BSA owners forum, 4 shots @ 45 yds from a rather tricked out Ultra with an EV2 barrel etpicyuhttp://i723.photobucket.com/albums/ww234/tillygti6/1dad1f12-7f52-484b-80ff-7e787ed3eaeb.jpg
    oops link doesnt wotk, bare with me
     
    Last edited: Sep 14, 2014
  16. mattyts

    mattyts Donator

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    [​IMG]
     
  17. nick2

    nick2 Keyboard Hero

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    Cheers Matty
     
  18. Bemused

    Bemused Engaging Member

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    I floated my EV mkI, less shift in POI and tighter grouping, I kept my barrel band unmolested for a few months untill I was sure it was beneficial then the band got cut and polished. Also use a UK Neil stripper to measurable gains on the 55 yarders.
     
  19. Awesime

    Awesime Air Arms Xti50 Test Pilot

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    A/ - Yes, on both of my Ostler EV2.

    B/ No need to float the barrel if the original AA muzzle weight (it does not strip air lol) slides off and on the Barrel no probs, i.e. does not hit a "bent" barrel.


    If you can not slide the unit on and off without hitting one edge of the barrel, the barrel need free floating as it is either bent or more probably not mounted correctly.
    This can lead to POI shift with expansion.

    I cured all problems with a working John Ostler Air Stripper and proper set up by Ostler. No one sets up an Ev2 better than John, a true gunsmith.
     
  20. rkr

    rkr Keyboard Hero

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    You could always carbon fiber sleeve the barrel for added stiffness.
     

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