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BSA Ultra

Discussion in 'Anything Airgun Related' started by Kamo, Jan 20, 2014.

  1. Kamo

    Kamo Member

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    Hi guys,

    I have just bagged a BSA Ultra in .22 single shot, And have couple of questions.

    1 the on line manual I have founds says fill to 200 bar. What do you guys fill yours to?

    2 it's running at 11.5flbs with airarms but it was cold when tested so a little worried about the warmer weather. Do You think it could go over?

    sorry if this has been done to death.

    thanks

    K
     
  2. ultra22

    ultra22 Engaging Member

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    Its fine, just enjoy :up:
     
  3. Alex.B

    Alex.B Keyboard Hero

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    I fill mine to 200 and get about 45 shots :D
     
  4. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Best thing to do is if you haven't got a chrono, get one!

    Then do some shot strings to ascertain where the sweet spot is for your rifle.....its called playing:up:
    My rifle runs at 11.2 in the winter with 14.4g jsb exact express, only rising to 11.4 max in the warmer weather :)
     
    Last edited: Jan 20, 2014
  5. mattyts

    mattyts Donator

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    Try testing it with Bisley Magnums + warm weather,it may be pretty close
     
  6. Kamo

    Kamo Member

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    Thanks guys...Can not wait to get to club at the weekend to test it out, I feel a sicky coming on :)
     
  7. Lee67

    Lee67 Posting Addict

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    Sweet spot is around 180 bar -190 bar...outta interest what club are u in?
     
  8. SteveO

    SteveO Top Poster

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    I fill mine to 220 bar but it has been blueprinted, not sure if that makes a difference!
     
  9. Kamo

    Kamo Member

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    Thanks lee. Redferns.
     
  10. clbarclay

    clbarclay Engaging Member

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    As already said its best to test yourself to be sure. Not all ultras are the same, they tweaked the hammer design around the time they started making the bolt action versions, which should give a few more shots and raises the optimum fill pressures. I have an older MMC ultra which has a quite a low optimum pressure (fill to 165 bar for 40 shots, peak muzzle energy around 140 bar). I tried filling it to 200 bar once when testing and the muzzle energy started very low. I do wounder though how accurate the pressure gauges are on filling equipment, mine could just be reading a tad low.
     
  11. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Stick a reg on it, fill to 250!

    loads a shots;)
     
  12. Biker_Bob

    Biker_Bob Active Member

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    I've got three in 177, all the early type.
    Best fill pressure on mine is 185, that gives 32 shots down to 100bar with no POI change at 35yds.
    Peak power is 11.6 at 140bar.
    Yours will be different as it's a 22.
    Get a chombro, fill the gun to 200bar and do a full string - it's the only way you can be sure.
     
  13. Kamo

    Kamo Member

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    Fair comment Biker, I'll stick it over the one at the club on sat. I'm itching to get it out shoulders so well.
     
  14. stevemandm

    stevemandm Honorary Member

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    hook up with lee mate, he's a good lad - wherabouts in wakey are you ?
     
  15. Kamo

    Kamo Member

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    Out in Ryhill mate, defo up for a meet with some wakey lads...

    K
     
  16. jambo1984

    jambo1984 Engaging Member

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    i always fill mine to 190 ...mine runs at 11.9 with aa fields
     
  17. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Mmmmm running a bit hot don't ye think, when the warmer weather comes it could sneak over!
     
  18. Kamo

    Kamo Member

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    seems a tad to close...
     
  19. stevemandm

    stevemandm Honorary Member

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    prob be 12.5 ish with the bis mags mate !
     
  20. stevemandm

    stevemandm Honorary Member

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    Location:
    in a distant galaxy, far far away ....... actually
    you're just a couple of miles from us - if you want, we could meet up with our chrony and sort out the optimum fill (and test the power )
     

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