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Thread: Need to better understand

  1. #1
    Join Date
    Apr 2015
    Location
    Lisbon
    Posts
    141

    Default Need to better understand

    One thing that I can't really understand is what my 24J rifle (regulated) is doing.

    Charged at 200bar it shoots at 304m/s and is spot on the target, and I do mean spot on, 5 shots or more, in the same hole.
    Somewhere after 10 shots it starts to open up, but still continues to shoot strongly at 304m/s. At this stage the pressure indicator has dropped to around 180bar (approximately as the scale is far from being easy to read).
    Continuing to shoot, meaning more 30~40 shots (pressure around 100bar) it will never can regroup as before, but, and here's the puzzle, it continues to shoot at 304m/s.
    Charged again to the max 200bar, et voila, the super tight group comes again, but only for 10 more shots... after that it spreads again.

    Any light on this?

  2. #2
    Join Date
    Feb 2010
    Location
    MIlw. WI
    Posts
    141

    Default

    depending on skirt of the pellet or whole pellet perhaps what you are experiencing is a failure to upset into the rifling at the lower pressures. have you ever tried various head diameter pellets to see if there is a change.
    Last edited by blades; 10-05-2015 at 11:20 AM.

  3. #3
    Join Date
    Apr 2015
    Location
    Lisbon
    Posts
    141

    Default

    Yes indeed, with 4.50 - 4.51 - 4.52

    I'll try when weather allow with a heavier pellet to decrease velocity.

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