calibre change lg110???

Discussion in 'Steyr' started by tillygti6, Sep 10, 2011.

  1. tillygti6

    tillygti6 Tilly's gun stocks

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    i may have come across a 110 in .22 and was wondering without actually having it in my hands whats involved in converting to .177?
    obviously barrel itself, what about the loading shuttle?? (is that what its called?) i gather the reg can be adjusted to a suitable pressure with re arrangement of the belvilles.?

    was thinking a bsa barrel may potentially be good ;)
    any advice welcomed. thanks tommy
     
  2. wiseguy

    wiseguy Active Member

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    You need just a 16mm diameter .177 barrel, nothing more.
    Regards,
    Rob
     
  3. tillygti6

    tillygti6 Tilly's gun stocks

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    thanks rob i thought as much! i have a couple of bsa barrels that would be perfect for the job,

    whats the average reg pressure on these in .177?
    thanks for the reply
    tommy
     
  4. CameronWilson

    CameronWilson Member

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    Probably about 90-100bar.

    Cam.
     
  5. Conor

    Conor Never been banned from sales Staff Member

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    85 bar ;)
     
  6. tillygti6

    tillygti6 Tilly's gun stocks

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    one thing i may have overlooked, the gun currently lives in europe running around 30ftlb, theres no issue bringing it into the country set below 12,as theres no FAC systems where its coming from, there is no regulation on the power,
    however would the reg in a 30lb gun run the pressures of uk sub 12? i imagine the presure wouldnt actually need dropping a great deal if any. but the hammer springing would need attention and likely the transfer port too.?

    seems a lot of faffing but potentially the price is favourable. plus its always nice to have a play!

    any thoughts on this?
     
  7. Tallguy

    Tallguy New Member

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    I want to convert my 40J LG .22 110HP to a 16-24J .177 110HP . Other than barrel swap sould I adjust the reg to 85bar?

    What would be the result if I onyl swap the barrel? Because I don't want to mess with the regulator.

    thanks
     
  8. tillygti6

    tillygti6 Tilly's gun stocks

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    im certainly no expert but i wouldnt imagine the reg in the fac gun is running much more than 100bar, if any so it shouldnt bee to dificult to lower it a touch. also some extra preload in the firing valve may bee a good idea.
    but like i say ive never had one apart (yet)
     
  9. wiseguy

    wiseguy Active Member

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    If you change the .22 barrel for a .177, a 40J .22 will end up somewhere around 24J in .177, same settings.
    The regulator is set at 115-125bar in the 40J .22 version (and 24J .177), depends on type, but usualy has 9 bellview washers inside.
    Take one washer out and rearrange the other 8 in this way ()()()() and you will be in the good direction regarding reg pressure. Some fine tuning can be done via the hammer-spring to get under 12fpe.
    It is not a must, to tune down the reg, you can achieve 12fpe with the higher reg pressure, but you will need to fill earlier as the poi starts dropping when reaching reg pressure, so less accurate shots.
    How UK law is on that I'm not sure as you can easily get way over 12fpe...
    If you want to be sure you don't exceed the 12fpe, insert the silver coloured transfer port instead of the black one.
    regards,
    Rob
     
    Last edited: Sep 11, 2011
  10. tillygti6

    tillygti6 Tilly's gun stocks

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    thanks for that rob! seems all straight forward enough,

    :D
    tommy
     
  11. Tallguy

    Tallguy New Member

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    thanks a lot Rob
     
  12. JEV

    JEV Member

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    If its an FAC gun you may need to remove the balll bearing from the power adjuster to reduce hammer spring pre load.
     
  13. wiseguy

    wiseguy Active Member

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    It's a .22 40J, these don't have the new hammer design with the extra ball bearing.
    This new hammer/spring/ext V0 etc can be mounted however, but it's not factory installed.
    The old type large hammerspring might be shortened a bit to be able to get under 12fpe without wasting too much air.
    regards,
    Rob
     

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