Measuring the rifle power

Discussion in 'Hunter (HFT) & Field Target (FT)' started by Delphinus, Nov 8, 2011.

  1. Delphinus

    Delphinus New Member

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    Can you guys tell me in detail how in a FT match the power of a rifle is measure?

    I would like to receive answers from UK and other countries.

    Thanks
     
  2. luger

    luger Malta's GOS!!!

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    Usually we measure the rifle power with the help of a chrono.........I think thats what the rest of the FT practicing countries do!
     
  3. Delphinus

    Delphinus New Member

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    Thanks for your replay.

    I ask in detail because we use pellets that our Federation provides, they are JSB Exact 4.5 (.177) / 5.0 (.20) and JSB 5.5 (.22)

    With those pellets the maximum speed is:

    International Class:

    244 (m/s) for 4.5
    191 (m/s) for 5.0
    178 (m/s) for 5.5

    Springer and PCP 24 Joules Class:

    296 (m/s) for 4.5
    233 (m/s) for 5.0
    216 (m/s) for 5.5

    Because the organization provides de pellets with a standard weight for that caliber this gives more power if you use a heavy pellet and less if you use an express, and the same applies if you use a diferent subcaliber.

    In my case in Spain I got 14J using my pellets and in Portugal 16J.
     
  4. Suzukiphil

    Suzukiphil Member

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    In the UK we do use crono's to measure the velocity of pellets, the bfta have set a limit just below the legal limit, legal limit minus 5 feet per second and there is a list of pellet weights and maximum velocities. Each gun is tested during a GP by a marshall and the velocity is recorded on the card.
    You should be able to find the regulations on the BFTA website.
     
  5. aitchuk

    aitchuk Member

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    Hi Delphinus in the BFTA we chrono using the shooters own pellets.

    The shooter tells the marshal on the chrono what type of pellet
    he is using

    the marshal then can check the weight of the pellet
    and the maximume permitted velosity on his data sheet

    for us the max is 5 FPS below the legal limit

    Aitch
     
  6. dhb

    dhb Canadian FT Novice

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    Does some have the velocity/weight chart that they could post online?
     
  7. Dave Ramshead

    Dave Ramshead England HFT Team squatter

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  8. Delphinus

    Delphinus New Member

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    The marshal table only has the 3 pellets of the excel file or more?

    Thanks for your help :D
     
  9. Dave Ramshead

    Dave Ramshead England HFT Team squatter

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    That table covers the popular light, medium and heavy pellets we use over here - it's easy enough to expand the table if you have a specific pellet in mind. :)
     

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