Three Air arms questions.

Discussion in 'Air Arms' started by Silver brewer, Oct 5, 2014.

  1. Silver brewer

    Silver brewer New Member

    Joined:
    Sep 6, 2014
    Messages:
    7
    Location:
    Sutton Coldfield
    What distance is the test card that air arms provide with their guns shot over?

    Does clamping the action of a PCP in a vice (extremely carefully) and firing in still air give the true grouping capability of the pellet,. By this I mean are there harmonics within the action that do not like getting clamped in a solid fixture like you may find in guns that recoil and expand barrels etc?

    Is there a defined name for the bi-pod mounting rail found under the stock of the FTP900 et all. It seems to take a head that is 1/10" thick and 1/2" wide, and has a 3/8" access slot, so it isn't metric and comes to us from a time when there were thruppeny bit's, and trains were interesting, but exploded now and then!

    Thanks,

    Rog
     
  2. D. Clark

    D. Clark Member

    Joined:
    Sep 7, 2009
    Messages:
    273
    Location:
    Hitchin
    Club:
    MidShires Marksmen
    I found this thread I have deleted the other two questions but would be very interested in your comments on the above.
    As I have been doing some pellet testing with actions clamped in vice.

    Thanks david
     
  3. Tench

    Tench WHFTA World Champion 2016.

    Joined:
    Sep 23, 2009
    Messages:
    1,719
    Location:
    derby
    I have seen a manufacturer use a vice with nylon V block jaws for action testing, it had a cam lock closing mechanism to ensure the correct and consistent clamping force. Actions were clamped with the firing valve/reg area in the clamps not the middle of the air tube!!

    Once you have a satisfactory holding method I would imagine the securing of this vice or what ever device to something immoveable is more of a problem for accuracy testing.
     

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