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Filling BSA Ultra with stirrup pump

Discussion in 'Anything Airgun Related' started by The_Saint, May 19, 2014.

  1. The_Saint

    The_Saint Engaging Member

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    woking bruv innit
    morning gents,
    bought a bsa ultra last week and a stirrup pump yesterday.
    i'm not a 7 stone weekling, but am struggling to get more than 170/180 lbs in the cylinder?
    do i need to worry or just play at that pressure?
    i shot 40 pellets yesterday and pressure went down to about 100/110 before i pumped it up again
    is this the real deal?
     
  2. nath92

    nath92 Donator

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    I personally remember having to drive the pump down with considerable effort for that last ten bar or so to 190 which concerned me at first but I was told this was normal although I would wait for a more experienced reply than mine ,miss mi ultra cracking little rifle
    Atb
    Nath
     
  3. secretagentmole

    secretagentmole Low down, dirty and quiet...

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  4. stevemandm

    stevemandm Honorary Member

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    in a distant galaxy, far far away ....... actually
    what you describe sounds normal. as above, the pump gets noticably harder to operates as the pressure rises - particularly over the 170 mark. if the ultra is not regulated, i would say that 170 bar is just about the optimum fill
     
  5. The_Saint

    The_Saint Engaging Member

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    thanks for the input gents, i always worry until i get told what i am doing is good
     
  6. RedandWhite

    RedandWhite Newbie

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    I use a pump to get my R-10 up to 232Bar. Just need to make sure your weight is over the handle and you really go to the bottom of the stroke.
     
  7. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    I pump to 230, but mine is regulated,

    The right technique makes it easier, using the whole body instead of just the arms:)
     
  8. anchovie

    anchovie Banned

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    Don't worry about it as that'll more than likely be in the sweet spot area for an ultra and any more air in an unregulated ultra will be a waste of effort and the shot count you say is about right , obviously you'd get more in .22 and perhaps a little less in .177
     
  9. Tweed

    Tweed Member

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    I use a Gunpower stirrup pump and mine is exactly the same. From 170 to 190 bar (which the last owner told me was its optimum) takes a bit of doing with the fill only happening in the last 20% of the pump stroke.
     
  10. cossy

    cossy Well-Known Member

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    I've been pumping my ultra and the only time I know what pressure is in, is only when I pump it up. how can I check what pressure is left?
     
  11. roy0110

    roy0110 Engaging Member

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    attach the pump and start pumping, weighing up how easy/ difficult it is to pump.
    when the pressure in the pump reaches the pressure left in the rifle it will suddenly become harder to pump, the reading on the pump gauge should now tell you what pressure is in your rife.
     
  12. cossy

    cossy Well-Known Member

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    yes I see that, I thought there was another way of checking whats in before you pump it up.
     
  13. anchovie

    anchovie Banned

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    There is you can fit a DIY pressure gauge that fits in the end of the air tube
     
  14. anchovie

    anchovie Banned

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  15. Westphalian

    Westphalian Donator

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    Hw100 no trouble to 200, airwolf exceeding strenuous from 100-230. My 21 yr old son literally cannot do it and it needs my sweaty 15 stone to get it to 230 and i'm talking about my heart rate.
     
  16. cossy

    cossy Well-Known Member

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    Cheers mate I'll have a look at that later
     

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