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Pcp Chrono Test.

Discussion in 'Technical' started by Igotknobblies, Jun 28, 2020.

  1. Igotknobblies

    Igotknobblies Engaging Member

    Likes Received:
    Birchington, Kent
    Hi all. I made a quick fit probe for foot pump charging of my gun, a Webley FX2000 in .22. I normally decant to 200bar as that's all I have in my cylinder. Im now ramming 220bar in there (on recommendation from my regulator supplier). Thought I'd better do a power check. 4 shots of each. Staple diet, AA diablo field highest reading 575fps at 16 grains is 11.75'Lbs. I've heard that heavier pellets through PCP's will give a higher reading. I then put four Bisley magnums through, highest at 479fps at 21.57grains is 10.99'Lb. Slightly surprised! I then went with good old RWS superdomes, highest was 592fps. "Uh-oh" I thought, here we go....
    At 14.5 grains, these were mid way in the power stakes at 11.28'Lb.
    I like the AA pellets but think I'll opt for the flatter trajectory with RWS.
    Can anyone shed light on whether it would be likely to go over with a pellet weight around 18 or more? There is also another factor.... Pellet size. A larger one will cause more drag on the rifling and I expect give a lesser reading. Does anyone have experience of the police test facilities and what pellets they use.... That would clear things up.
    Cheers all, IGK

    Attached Files:

  2. Septic

    Septic Superbus et Vetera

    Likes Received:
    Caythorpe. Lincolnshire.
    There are a couple of threads covering legality testing already.. But basically.. Stay below 11.5 with the pellet you get most from and they shouldn’t get more than 12 if they test it...

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